/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:26:14,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:26:14,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:26:14,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:26:14,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:26:14,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:26:14,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:26:14,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:26:14,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:26:14,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:26:14,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:26:14,532 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:26:14,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:26:14,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:26:14,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:26:14,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:26:14,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:26:14,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:26:14,534 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:26:14,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:26:14,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:26:14,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:26:14,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:26:14,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:26:14,819 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:26:14,820 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:26:14,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl [2021-07-09 18:26:14,821 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl' [2021-07-09 18:26:14,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:26:14,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:26:14,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:26:14,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:26:14,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:26:14,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:26:14,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:26:14,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:26:14,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:26:14,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... [2021-07-09 18:26:14,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:26:14,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:26:14,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:26:14,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:26:14,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:26:14,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:26:14,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:26:14,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:26:14,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:26:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:26:14,968 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:26:14,968 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:26:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:26:14,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:26:14,968 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:26:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:26:14,968 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:26:14,975 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:26:15,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:26:15,113 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:26:15,114 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:26:15 BoogieIcfgContainer [2021-07-09 18:26:15,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:26:15,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:26:15,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:26:15,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:26:15,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:26:14" (1/2) ... [2021-07-09 18:26:15,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6b8734 and model type max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:26:15, skipping insertion in model container [2021-07-09 18:26:15,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:26:15" (2/2) ... [2021-07-09 18:26:15,119 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array-hom.wvr.bpl [2021-07-09 18:26:15,135 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:26:15,135 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:26:15,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:26:15,136 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:26:15,163 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:26:15,176 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:26:15,187 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:26:15,188 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:26:15,188 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:26:15,188 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:26:15,188 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:26:15,188 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:26:15,188 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:26:15,188 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:26:15,194 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-09 18:26:15,212 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:26:15,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:15,221 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:15,221 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash -234684100, now seen corresponding path program 1 times [2021-07-09 18:26:15,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:15,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891262673] [2021-07-09 18:26:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:15,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:15,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891262673] [2021-07-09 18:26:15,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891262673] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:26:15,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:26:15,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:26:15,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933095587] [2021-07-09 18:26:15,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:26:15,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:15,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:26:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:26:15,349 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:15,376 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-09 18:26:15,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:26:15,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:26:15,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:15,386 INFO L225 Difference]: With dead ends: 217 [2021-07-09 18:26:15,386 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 18:26:15,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:26:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 18:26:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-09 18:26:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-09 18:26:15,426 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-09 18:26:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:15,426 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-09 18:26:15,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-09 18:26:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:26:15,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:15,429 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:15,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:26:15,431 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:15,432 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-07-09 18:26:15,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:15,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826540039] [2021-07-09 18:26:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:15,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826540039] [2021-07-09 18:26:15,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826540039] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:26:15,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:26:15,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:26:15,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713466186] [2021-07-09 18:26:15,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:26:15,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:15,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:26:15,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:26:15,485 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:15,517 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-09 18:26:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:26:15,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:26:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:15,519 INFO L225 Difference]: With dead ends: 158 [2021-07-09 18:26:15,519 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 18:26:15,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:26:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 18:26:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-09 18:26:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-09 18:26:15,531 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-09 18:26:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:15,531 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-09 18:26:15,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-09 18:26:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:26:15,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:15,532 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:15,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:26:15,533 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:15,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1176026010, now seen corresponding path program 1 times [2021-07-09 18:26:15,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:15,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017406741] [2021-07-09 18:26:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:15,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017406741] [2021-07-09 18:26:15,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017406741] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:26:15,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:26:15,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:26:15,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936868675] [2021-07-09 18:26:15,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:26:15,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:15,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:26:15,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:26:15,569 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:15,600 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-09 18:26:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:26:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:26:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:15,627 INFO L225 Difference]: With dead ends: 183 [2021-07-09 18:26:15,627 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 18:26:15,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:26:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 18:26:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-09 18:26:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-09 18:26:15,655 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-09 18:26:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:15,656 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-09 18:26:15,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-09 18:26:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:26:15,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:15,657 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:15,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:26:15,658 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:15,658 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-07-09 18:26:15,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:15,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639645976] [2021-07-09 18:26:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:15,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:15,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639645976] [2021-07-09 18:26:15,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639645976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:15,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387453609] [2021-07-09 18:26:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:16,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:26:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:16,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:26:16,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:16,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:26:16,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:16,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:26:16,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:16,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:16,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:16,326 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-07-09 18:26:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:16,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387453609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:16,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:16,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:26:16,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312595492] [2021-07-09 18:26:16,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:26:16,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:16,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:26:16,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:16,376 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:16,601 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-09 18:26:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:26:16,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:26:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:16,606 INFO L225 Difference]: With dead ends: 330 [2021-07-09 18:26:16,606 INFO L226 Difference]: Without dead ends: 315 [2021-07-09 18:26:16,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:26:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-09 18:26:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-09 18:26:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-09 18:26:16,630 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-09 18:26:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:16,630 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-09 18:26:16,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-09 18:26:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:26:16,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:16,631 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:16,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:16,832 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:16,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:16,833 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-07-09 18:26:16,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:16,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181875927] [2021-07-09 18:26:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:17,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:17,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181875927] [2021-07-09 18:26:17,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181875927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:17,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145530936] [2021-07-09 18:26:17,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:17,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:17,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:26:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:17,328 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:26:17,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:26:17,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:17,339 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:26:17,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:26:17,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:17,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:17,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:26:17,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:17,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:17,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:26:17,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:17,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:17,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:26:17,415 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-07-09 18:26:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:17,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145530936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:17,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:17,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 18:26:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670612420] [2021-07-09 18:26:17,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:26:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:26:17,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:26:17,525 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:18,015 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-09 18:26:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:26:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:26:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:18,017 INFO L225 Difference]: With dead ends: 374 [2021-07-09 18:26:18,017 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 18:26:18,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:26:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 18:26:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-09 18:26:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-09 18:26:18,024 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-09 18:26:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:18,024 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-09 18:26:18,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-09 18:26:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:26:18,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:18,026 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:18,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:18,244 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-07-09 18:26:18,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:18,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286950854] [2021-07-09 18:26:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:18,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286950854] [2021-07-09 18:26:18,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286950854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760038334] [2021-07-09 18:26:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:18,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:26:18,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:26:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:18,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:26:18,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:18,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:26:18,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:18,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:26:18,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:18,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:26:18,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:18,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:26:18,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:18,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:26:18,514 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:18,532 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-09 18:26:18,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:18,533 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-07-09 18:26:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:18,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760038334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:18,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:18,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:26:18,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387051237] [2021-07-09 18:26:18,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:26:18,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:18,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:26:18,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:26:18,565 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:18,703 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-07-09 18:26:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:26:18,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:26:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:18,705 INFO L225 Difference]: With dead ends: 296 [2021-07-09 18:26:18,705 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 18:26:18,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:26:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 18:26:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-07-09 18:26:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-09 18:26:18,711 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-09 18:26:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:18,711 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-09 18:26:18,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-09 18:26:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:26:18,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:18,712 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:18,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:26:18,928 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-07-09 18:26:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:18,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999252613] [2021-07-09 18:26:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:19,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:19,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999252613] [2021-07-09 18:26:19,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999252613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:19,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266664882] [2021-07-09 18:26:19,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:19,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:19,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:19,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:26:19,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:19,358 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:26:19,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:26:19,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:19,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:19,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:26:19,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:19,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:19,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:19,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:26:19,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:19,448 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:26:19,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:26:19,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:19,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:19,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:26:19,502 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-07-09 18:26:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:19,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266664882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:19,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:19,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:26:19,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952089160] [2021-07-09 18:26:19,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:19,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:19,621 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:19,980 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-07-09 18:26:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:26:19,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:26:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:19,982 INFO L225 Difference]: With dead ends: 409 [2021-07-09 18:26:19,982 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 18:26:19,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:26:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 18:26:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-07-09 18:26:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-09 18:26:19,987 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-09 18:26:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:19,988 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-09 18:26:19,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-09 18:26:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:19,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:19,991 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:20,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:20,195 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-07-09 18:26:20,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:20,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552071208] [2021-07-09 18:26:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:20,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:20,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552071208] [2021-07-09 18:26:20,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552071208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:20,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508399102] [2021-07-09 18:26:20,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:20,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:26:20,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:20,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508399102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:20,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:20,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:26:20,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144964572] [2021-07-09 18:26:20,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:26:20,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:20,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:26:20,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:20,366 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:20,663 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-09 18:26:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:26:20,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:20,666 INFO L225 Difference]: With dead ends: 619 [2021-07-09 18:26:20,666 INFO L226 Difference]: Without dead ends: 619 [2021-07-09 18:26:20,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:26:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-09 18:26:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-09 18:26:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-09 18:26:20,673 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-09 18:26:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:20,673 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-09 18:26:20,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:20,673 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-09 18:26:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:20,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:20,674 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:20,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:26:20,890 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:20,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-07-09 18:26:20,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:20,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88138071] [2021-07-09 18:26:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:20,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:20,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88138071] [2021-07-09 18:26:20,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88138071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:20,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456170673] [2021-07-09 18:26:20,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:20,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:26:20,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:20,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:21,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456170673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:21,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:21,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:21,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206644882] [2021-07-09 18:26:21,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:21,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:21,048 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:21,724 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-09 18:26:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:26:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:21,728 INFO L225 Difference]: With dead ends: 1078 [2021-07-09 18:26:21,728 INFO L226 Difference]: Without dead ends: 1078 [2021-07-09 18:26:21,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 423.4ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:26:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-09 18:26:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-09 18:26:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-09 18:26:21,739 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-09 18:26:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:21,739 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-09 18:26:21,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-09 18:26:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:21,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:21,740 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:21,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:21,957 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-07-09 18:26:21,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:21,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391724042] [2021-07-09 18:26:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:21,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391724042] [2021-07-09 18:26:21,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391724042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:21,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417023170] [2021-07-09 18:26:21,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:22,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:22,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417023170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:22,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:22,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:22,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631301346] [2021-07-09 18:26:22,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:22,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:22,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:22,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:22,097 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:22,720 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-09 18:26:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:26:22,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:22,724 INFO L225 Difference]: With dead ends: 951 [2021-07-09 18:26:22,724 INFO L226 Difference]: Without dead ends: 951 [2021-07-09 18:26:22,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:26:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-09 18:26:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-09 18:26:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-09 18:26:22,733 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-09 18:26:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:22,734 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-09 18:26:22,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-09 18:26:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:22,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:22,734 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:22,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:22,955 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-07-09 18:26:22,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:22,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235616909] [2021-07-09 18:26:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:22,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:22,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235616909] [2021-07-09 18:26:22,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235616909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:22,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053975049] [2021-07-09 18:26:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:23,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:26:23,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:23,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053975049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:23,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:23,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:26:23,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241123660] [2021-07-09 18:26:23,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:26:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:26:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:26:23,085 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:23,175 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-09 18:26:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:26:23,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:23,178 INFO L225 Difference]: With dead ends: 669 [2021-07-09 18:26:23,178 INFO L226 Difference]: Without dead ends: 663 [2021-07-09 18:26:23,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-09 18:26:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-09 18:26:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-09 18:26:23,187 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-09 18:26:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:23,187 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-09 18:26:23,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:23,187 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-09 18:26:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:23,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:23,188 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:26:23,400 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-07-09 18:26:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606587955] [2021-07-09 18:26:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:23,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606587955] [2021-07-09 18:26:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606587955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657832506] [2021-07-09 18:26:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:23,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:23,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:23,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:23,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:23,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657832506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:23,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:23,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:26:23,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824092491] [2021-07-09 18:26:23,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:23,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:23,558 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:23,717 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-09 18:26:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:26:23,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:23,731 INFO L225 Difference]: With dead ends: 710 [2021-07-09 18:26:23,731 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 18:26:23,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:26:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 18:26:23,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-09 18:26:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-09 18:26:23,760 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-09 18:26:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:23,760 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-09 18:26:23,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-09 18:26:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:23,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:23,761 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:23,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:23,962 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-07-09 18:26:23,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:23,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304837550] [2021-07-09 18:26:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:23,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:23,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304837550] [2021-07-09 18:26:23,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304837550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:23,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150358140] [2021-07-09 18:26:23,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:24,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:24,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:24,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:26:24,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:24,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150358140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:24,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:24,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:26:24,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434753965] [2021-07-09 18:26:24,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:26:24,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:26:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:26:24,116 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:24,200 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-09 18:26:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:26:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:24,204 INFO L225 Difference]: With dead ends: 830 [2021-07-09 18:26:24,204 INFO L226 Difference]: Without dead ends: 830 [2021-07-09 18:26:24,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-09 18:26:24,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-09 18:26:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-09 18:26:24,215 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-09 18:26:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:24,215 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-09 18:26:24,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-09 18:26:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:24,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:24,216 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:24,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:26:24,434 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:24,434 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-07-09 18:26:24,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:24,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836019311] [2021-07-09 18:26:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:24,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:24,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836019311] [2021-07-09 18:26:24,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836019311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:24,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940887780] [2021-07-09 18:26:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:24,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:26:24,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:24,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:24,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940887780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:24,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:24,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:26:24,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009612097] [2021-07-09 18:26:24,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:26:24,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:24,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:26:24,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:26:24,587 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:24,856 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-09 18:26:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:26:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:24,861 INFO L225 Difference]: With dead ends: 1196 [2021-07-09 18:26:24,861 INFO L226 Difference]: Without dead ends: 1196 [2021-07-09 18:26:24,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:26:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-09 18:26:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-09 18:26:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-09 18:26:24,876 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-09 18:26:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:24,876 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-09 18:26:24,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-09 18:26:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:24,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:24,877 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:25,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:26:25,094 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-07-09 18:26:25,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:25,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118926862] [2021-07-09 18:26:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:25,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:25,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118926862] [2021-07-09 18:26:25,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118926862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:25,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233669847] [2021-07-09 18:26:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:25,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:25,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:25,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:25,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:25,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233669847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:25,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:25,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:26:25,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759829638] [2021-07-09 18:26:25,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:26:25,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:25,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:26:25,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:26:25,257 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:25,644 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-09 18:26:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:26:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:25,650 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 18:26:25,650 INFO L226 Difference]: Without dead ends: 1492 [2021-07-09 18:26:25,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:26:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-09 18:26:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-09 18:26:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-09 18:26:25,667 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-09 18:26:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:25,667 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-09 18:26:25,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-09 18:26:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:25,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:25,669 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:25,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:26:25,886 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-07-09 18:26:25,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:25,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759744596] [2021-07-09 18:26:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:25,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:25,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759744596] [2021-07-09 18:26:25,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759744596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:25,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882764139] [2021-07-09 18:26:25,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:25,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:25,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:25,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:26,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882764139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:26,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:26,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:26:26,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183531507] [2021-07-09 18:26:26,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:26,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:26,019 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:26,237 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-09 18:26:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:26:26,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:26,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:26,242 INFO L225 Difference]: With dead ends: 1258 [2021-07-09 18:26:26,242 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 18:26:26,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:26:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 18:26:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-09 18:26:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-09 18:26:26,275 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-09 18:26:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:26,276 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-09 18:26:26,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-09 18:26:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:26,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:26,277 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:26,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-09 18:26:26,494 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-07-09 18:26:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:26,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353936470] [2021-07-09 18:26:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:26,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:26,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353936470] [2021-07-09 18:26:26,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353936470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:26,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893131096] [2021-07-09 18:26:26,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:26,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:26:26,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:26,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:26,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893131096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:26,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:26,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:26:26,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594512416] [2021-07-09 18:26:26,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:26,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:26,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:26,651 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:26,953 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-09 18:26:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:26:26,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:26,958 INFO L225 Difference]: With dead ends: 1329 [2021-07-09 18:26:26,958 INFO L226 Difference]: Without dead ends: 1329 [2021-07-09 18:26:26,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-09 18:26:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-09 18:26:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-09 18:26:26,975 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-09 18:26:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:26,975 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-09 18:26:26,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-09 18:26:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:26,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:26,976 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:27,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:27,192 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-07-09 18:26:27,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:27,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872327786] [2021-07-09 18:26:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:27,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:27,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872327786] [2021-07-09 18:26:27,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872327786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:27,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400167582] [2021-07-09 18:26:27,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:27,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400167582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:27,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:27,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:26:27,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368055196] [2021-07-09 18:26:27,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:26:27,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:27,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:26:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:26:27,326 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:27,657 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-09 18:26:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:26:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:27,662 INFO L225 Difference]: With dead ends: 1548 [2021-07-09 18:26:27,662 INFO L226 Difference]: Without dead ends: 1544 [2021-07-09 18:26:27,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-09 18:26:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-09 18:26:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-09 18:26:27,683 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-09 18:26:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:27,683 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-09 18:26:27,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:27,684 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-09 18:26:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:27,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:27,686 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:27,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:27,905 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:27,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-07-09 18:26:27,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:27,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080186682] [2021-07-09 18:26:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:27,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:27,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080186682] [2021-07-09 18:26:27,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080186682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:27,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49424280] [2021-07-09 18:26:27,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:27,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:27,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:28,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49424280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:28,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:28,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070298525] [2021-07-09 18:26:28,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:28,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:28,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:28,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:28,071 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:28,776 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-09 18:26:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:26:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:28,786 INFO L225 Difference]: With dead ends: 2734 [2021-07-09 18:26:28,786 INFO L226 Difference]: Without dead ends: 2734 [2021-07-09 18:26:28,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:26:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-09 18:26:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-09 18:26:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-09 18:26:28,812 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-09 18:26:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:28,812 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-09 18:26:28,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-09 18:26:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:28,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:28,814 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:29,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:29,029 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-07-09 18:26:29,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:29,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42884819] [2021-07-09 18:26:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:29,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:29,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42884819] [2021-07-09 18:26:29,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42884819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:29,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86857322] [2021-07-09 18:26:29,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:29,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:26:29,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:29,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:29,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86857322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:29,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:29,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:29,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275617427] [2021-07-09 18:26:29,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:29,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:29,162 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:29,897 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-09 18:26:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:26:29,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:29,905 INFO L225 Difference]: With dead ends: 2693 [2021-07-09 18:26:29,905 INFO L226 Difference]: Without dead ends: 2693 [2021-07-09 18:26:29,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:26:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-09 18:26:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-09 18:26:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-09 18:26:29,930 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-09 18:26:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:29,931 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-09 18:26:29,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-09 18:26:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:29,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:29,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:30,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:26:30,151 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:30,151 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-07-09 18:26:30,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:30,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732256339] [2021-07-09 18:26:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:30,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:30,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732256339] [2021-07-09 18:26:30,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732256339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:30,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579751760] [2021-07-09 18:26:30,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:26:30,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:30,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:30,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:30,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579751760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:30,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:30,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:26:30,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132417869] [2021-07-09 18:26:30,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:26:30,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:30,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:26:30,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:30,280 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:30,928 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-09 18:26:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:26:30,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:30,935 INFO L225 Difference]: With dead ends: 2677 [2021-07-09 18:26:30,935 INFO L226 Difference]: Without dead ends: 2677 [2021-07-09 18:26:30,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:26:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-09 18:26:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-09 18:26:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-09 18:26:30,960 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-09 18:26:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:30,960 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-09 18:26:30,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-09 18:26:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:30,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:30,962 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:31,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:26:31,178 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-07-09 18:26:31,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:31,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211829047] [2021-07-09 18:26:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:31,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:31,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211829047] [2021-07-09 18:26:31,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211829047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:31,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67725362] [2021-07-09 18:26:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:31,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:26:31,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:31,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:31,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67725362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:31,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:31,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:26:31,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179126256] [2021-07-09 18:26:31,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:26:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:26:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:31,296 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:31,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:31,902 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-09 18:26:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:26:31,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:31,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:31,908 INFO L225 Difference]: With dead ends: 2474 [2021-07-09 18:26:31,908 INFO L226 Difference]: Without dead ends: 2470 [2021-07-09 18:26:31,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:26:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-09 18:26:31,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-09 18:26:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-09 18:26:31,936 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-09 18:26:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:31,936 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-09 18:26:31,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-09 18:26:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:31,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:31,938 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:32,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:26:32,152 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-07-09 18:26:32,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:32,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842235483] [2021-07-09 18:26:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:32,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:32,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842235483] [2021-07-09 18:26:32,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842235483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:32,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392412220] [2021-07-09 18:26:32,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:32,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:26:32,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:32,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:32,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392412220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:32,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:32,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:32,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736835621] [2021-07-09 18:26:32,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:32,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:32,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:32,291 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:32,898 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-09 18:26:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:26:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:32,904 INFO L225 Difference]: With dead ends: 2514 [2021-07-09 18:26:32,904 INFO L226 Difference]: Without dead ends: 2514 [2021-07-09 18:26:32,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:26:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-09 18:26:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-09 18:26:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-09 18:26:32,928 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-09 18:26:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:32,928 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-09 18:26:32,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-09 18:26:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:32,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:32,930 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:33,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:26:33,145 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-07-09 18:26:33,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:33,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072561324] [2021-07-09 18:26:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:33,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:33,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072561324] [2021-07-09 18:26:33,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072561324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:33,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373717911] [2021-07-09 18:26:33,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373717911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:33,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:33,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:33,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605775239] [2021-07-09 18:26:33,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:33,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:33,269 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:33,889 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-09 18:26:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:26:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:33,895 INFO L225 Difference]: With dead ends: 2332 [2021-07-09 18:26:33,895 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 18:26:33,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:26:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 18:26:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-09 18:26:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-09 18:26:33,917 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-09 18:26:33,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:33,917 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-09 18:26:33,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:33,917 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-09 18:26:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:33,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:33,919 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:34,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:26:34,135 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:34,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-07-09 18:26:34,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:34,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430665841] [2021-07-09 18:26:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:34,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:34,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430665841] [2021-07-09 18:26:34,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430665841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:34,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876870631] [2021-07-09 18:26:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:34,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:26:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:26:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:34,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876870631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:34,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:34,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:26:34,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594212493] [2021-07-09 18:26:34,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:26:34,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:34,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:26:34,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:26:34,221 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:34,297 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-09 18:26:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:26:34,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:34,299 INFO L225 Difference]: With dead ends: 929 [2021-07-09 18:26:34,299 INFO L226 Difference]: Without dead ends: 929 [2021-07-09 18:26:34,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:34,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-09 18:26:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-09 18:26:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-09 18:26:34,311 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-09 18:26:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:34,311 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-09 18:26:34,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-09 18:26:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:34,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:34,313 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:34,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:34,529 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:34,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:34,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-07-09 18:26:34,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:34,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654504773] [2021-07-09 18:26:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:34,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:34,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654504773] [2021-07-09 18:26:34,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654504773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:34,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217473366] [2021-07-09 18:26:34,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:34,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:34,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:34,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:34,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217473366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:34,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:34,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:26:34,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825789208] [2021-07-09 18:26:34,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:26:34,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:34,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:26:34,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:26:34,634 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:34,920 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-09 18:26:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:26:34,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:34,923 INFO L225 Difference]: With dead ends: 1555 [2021-07-09 18:26:34,923 INFO L226 Difference]: Without dead ends: 1555 [2021-07-09 18:26:34,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-09 18:26:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-09 18:26:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-09 18:26:34,938 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-09 18:26:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:34,938 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-09 18:26:34,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-09 18:26:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:34,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:34,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:35,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:35,156 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-07-09 18:26:35,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:35,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683717661] [2021-07-09 18:26:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:35,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:35,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683717661] [2021-07-09 18:26:35,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683717661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:35,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338177060] [2021-07-09 18:26:35,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:35,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:26:35,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:35,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338177060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:35,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:35,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:26:35,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778276621] [2021-07-09 18:26:35,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:26:35,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:35,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:26:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:26:35,263 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:35,491 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-09 18:26:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:26:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:35,495 INFO L225 Difference]: With dead ends: 1605 [2021-07-09 18:26:35,495 INFO L226 Difference]: Without dead ends: 1605 [2021-07-09 18:26:35,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:26:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-09 18:26:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-09 18:26:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-09 18:26:35,510 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-09 18:26:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:35,510 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-09 18:26:35,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-09 18:26:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:35,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:35,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:35,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:35,728 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:35,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:35,728 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-07-09 18:26:35,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:35,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351718468] [2021-07-09 18:26:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:35,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351718468] [2021-07-09 18:26:35,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351718468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:35,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950269590] [2021-07-09 18:26:35,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:35,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:35,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:35,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:35,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:35,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950269590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:35,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:35,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:26:35,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362624250] [2021-07-09 18:26:35,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:26:35,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:26:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:26:35,815 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:35,991 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-09 18:26:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:26:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:35,994 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 18:26:35,994 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 18:26:35,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:26:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 18:26:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-09 18:26:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-09 18:26:36,009 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-09 18:26:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:36,009 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-09 18:26:36,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-09 18:26:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:36,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:36,011 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:36,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 18:26:36,227 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:36,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-07-09 18:26:36,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:36,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655690004] [2021-07-09 18:26:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:36,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655690004] [2021-07-09 18:26:36,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655690004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928758005] [2021-07-09 18:26:36,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:36,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:26:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:36,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928758005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:36,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:36,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:26:36,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585141877] [2021-07-09 18:26:36,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:26:36,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:36,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:26:36,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:26:36,317 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:36,525 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-09 18:26:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:26:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:36,528 INFO L225 Difference]: With dead ends: 1508 [2021-07-09 18:26:36,528 INFO L226 Difference]: Without dead ends: 1496 [2021-07-09 18:26:36,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:26:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-09 18:26:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-09 18:26:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-09 18:26:36,543 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-09 18:26:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:36,543 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-09 18:26:36,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-09 18:26:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:36,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:36,545 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:36,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:36,761 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:36,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:36,761 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-07-09 18:26:36,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:36,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978698518] [2021-07-09 18:26:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:36,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:36,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978698518] [2021-07-09 18:26:36,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978698518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:36,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077340586] [2021-07-09 18:26:36,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:36,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:26:36,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:36,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:36,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077340586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:36,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:36,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:36,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988253820] [2021-07-09 18:26:36,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:36,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:36,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:36,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:36,929 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:37,489 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-09 18:26:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:26:37,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:37,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:37,493 INFO L225 Difference]: With dead ends: 2412 [2021-07-09 18:26:37,493 INFO L226 Difference]: Without dead ends: 2412 [2021-07-09 18:26:37,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:26:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-09 18:26:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-09 18:26:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-09 18:26:37,549 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-09 18:26:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:37,549 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-09 18:26:37,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-09 18:26:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:37,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:37,551 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:37,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:26:37,766 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:37,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-07-09 18:26:37,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:37,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607653580] [2021-07-09 18:26:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:37,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:37,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607653580] [2021-07-09 18:26:37,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607653580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:37,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823254740] [2021-07-09 18:26:37,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:37,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823254740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:37,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:37,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:37,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772169236] [2021-07-09 18:26:37,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:37,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:37,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:37,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:37,898 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:38,337 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-09 18:26:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:26:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:38,341 INFO L225 Difference]: With dead ends: 2335 [2021-07-09 18:26:38,341 INFO L226 Difference]: Without dead ends: 2335 [2021-07-09 18:26:38,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:26:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-09 18:26:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-09 18:26:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:26:38,365 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:26:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:38,365 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:26:38,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:26:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:38,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:38,378 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:38,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:38,594 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-07-09 18:26:38,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:38,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446167635] [2021-07-09 18:26:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:38,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:38,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446167635] [2021-07-09 18:26:38,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446167635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:38,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573016781] [2021-07-09 18:26:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:26:38,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:38,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:38,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:38,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573016781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:38,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:38,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:26:38,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246729512] [2021-07-09 18:26:38,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:26:38,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:38,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:26:38,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:38,803 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:39,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:39,178 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-09 18:26:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:26:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:39,183 INFO L225 Difference]: With dead ends: 2285 [2021-07-09 18:26:39,183 INFO L226 Difference]: Without dead ends: 2285 [2021-07-09 18:26:39,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:26:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-09 18:26:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-09 18:26:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:26:39,202 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:26:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:39,202 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:26:39,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:26:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:39,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:39,204 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:39,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:26:39,417 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-07-09 18:26:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:39,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742170600] [2021-07-09 18:26:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:39,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742170600] [2021-07-09 18:26:39,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742170600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853301441] [2021-07-09 18:26:39,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:39,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:26:39,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:39,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:39,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853301441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:39,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:39,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:26:39,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345693683] [2021-07-09 18:26:39,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:26:39,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:39,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:26:39,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:39,526 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:39,886 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-09 18:26:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:26:39,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:39,890 INFO L225 Difference]: With dead ends: 2176 [2021-07-09 18:26:39,890 INFO L226 Difference]: Without dead ends: 2172 [2021-07-09 18:26:39,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-09 18:26:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-09 18:26:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:26:39,910 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:26:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:39,910 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:26:39,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:26:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:39,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:39,912 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:40,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:40,128 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-07-09 18:26:40,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:40,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690946585] [2021-07-09 18:26:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:40,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690946585] [2021-07-09 18:26:40,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690946585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150481575] [2021-07-09 18:26:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:40,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:40,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:40,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:40,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150481575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:40,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:40,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:40,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765825039] [2021-07-09 18:26:40,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:40,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:40,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:40,263 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:40,622 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-09 18:26:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:26:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:40,626 INFO L225 Difference]: With dead ends: 2199 [2021-07-09 18:26:40,626 INFO L226 Difference]: Without dead ends: 2199 [2021-07-09 18:26:40,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:26:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-09 18:26:40,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-09 18:26:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:26:40,663 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:26:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:40,663 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:26:40,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:26:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:40,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:40,665 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:40,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:26:40,882 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-07-09 18:26:40,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:40,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218923567] [2021-07-09 18:26:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:40,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:40,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218923567] [2021-07-09 18:26:40,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218923567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:40,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718252002] [2021-07-09 18:26:40,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:26:40,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:26:40,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:41,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718252002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:41,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:41,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835705086] [2021-07-09 18:26:41,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:41,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:41,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:41,027 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:41,358 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-09 18:26:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:26:41,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:41,362 INFO L225 Difference]: With dead ends: 2156 [2021-07-09 18:26:41,362 INFO L226 Difference]: Without dead ends: 2152 [2021-07-09 18:26:41,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:26:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-09 18:26:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-09 18:26:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:26:41,381 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:26:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:41,381 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:26:41,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:26:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:41,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:41,383 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:41,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:26:41,593 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-07-09 18:26:41,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:41,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712883255] [2021-07-09 18:26:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:41,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:41,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712883255] [2021-07-09 18:26:41,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712883255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:41,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911966676] [2021-07-09 18:26:41,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:41,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:26:41,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:41,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:41,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911966676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:41,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:41,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:26:41,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698776470] [2021-07-09 18:26:41,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:26:41,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:26:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:26:41,726 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:42,062 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-09 18:26:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:26:42,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:42,066 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 18:26:42,066 INFO L226 Difference]: Without dead ends: 2097 [2021-07-09 18:26:42,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:26:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-09 18:26:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-09 18:26:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-09 18:26:42,085 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-09 18:26:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:42,086 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-09 18:26:42,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-09 18:26:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:42,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:42,087 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:42,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:42,303 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-07-09 18:26:42,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:42,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64113198] [2021-07-09 18:26:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:42,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:42,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64113198] [2021-07-09 18:26:42,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64113198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:42,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326003049] [2021-07-09 18:26:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:42,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:42,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:42,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326003049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:42,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:42,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:26:42,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632119835] [2021-07-09 18:26:42,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:26:42,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:42,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:26:42,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:26:42,442 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:42,727 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-09 18:26:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:26:42,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:42,730 INFO L225 Difference]: With dead ends: 1963 [2021-07-09 18:26:42,730 INFO L226 Difference]: Without dead ends: 1959 [2021-07-09 18:26:42,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-09 18:26:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-09 18:26:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-09 18:26:42,748 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-09 18:26:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:42,748 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-09 18:26:42,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-09 18:26:42,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:42,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:42,750 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:42,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-09 18:26:42,966 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:42,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-07-09 18:26:42,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:42,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760547108] [2021-07-09 18:26:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:42,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:42,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760547108] [2021-07-09 18:26:42,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760547108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:42,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145966633] [2021-07-09 18:26:42,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:43,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:43,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:43,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:43,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145966633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:43,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:43,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:26:43,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559642277] [2021-07-09 18:26:43,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:26:43,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:26:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:26:43,070 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:43,270 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-09 18:26:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:26:43,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:43,273 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 18:26:43,273 INFO L226 Difference]: Without dead ends: 1716 [2021-07-09 18:26:43,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:26:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-09 18:26:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-09 18:26:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-09 18:26:43,290 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-09 18:26:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:43,290 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-09 18:26:43,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-09 18:26:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:43,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:43,291 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:43,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:43,508 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:43,508 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-07-09 18:26:43,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:43,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395603598] [2021-07-09 18:26:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:43,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:43,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395603598] [2021-07-09 18:26:43,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395603598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:43,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319060864] [2021-07-09 18:26:43,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:43,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:26:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319060864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:43,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:43,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:43,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243937324] [2021-07-09 18:26:43,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:43,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:43,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:43,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:43,658 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:43,948 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-09 18:26:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:26:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:43,951 INFO L225 Difference]: With dead ends: 1821 [2021-07-09 18:26:43,951 INFO L226 Difference]: Without dead ends: 1821 [2021-07-09 18:26:43,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:26:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-09 18:26:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-09 18:26:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-09 18:26:43,969 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-09 18:26:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:43,969 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-09 18:26:43,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-09 18:26:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:43,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:43,971 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:44,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 18:26:44,188 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:44,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-07-09 18:26:44,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:44,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176363121] [2021-07-09 18:26:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:44,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:44,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176363121] [2021-07-09 18:26:44,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176363121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:44,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537998781] [2021-07-09 18:26:44,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:44,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:44,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:44,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537998781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:44,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:44,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:26:44,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604710626] [2021-07-09 18:26:44,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:26:44,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:26:44,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:26:44,324 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:44,585 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-09 18:26:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:26:44,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:44,588 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 18:26:44,588 INFO L226 Difference]: Without dead ends: 1786 [2021-07-09 18:26:44,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:26:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-09 18:26:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-09 18:26:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-09 18:26:44,605 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-09 18:26:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:44,605 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-09 18:26:44,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-09 18:26:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:26:44,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:44,607 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:44,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:26:44,821 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-07-09 18:26:44,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:44,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087348997] [2021-07-09 18:26:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:44,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:44,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087348997] [2021-07-09 18:26:44,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087348997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:44,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478431794] [2021-07-09 18:26:44,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:44,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:26:44,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:44,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:26:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:44,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478431794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:44,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:44,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:26:44,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539529831] [2021-07-09 18:26:44,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:26:44,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:44,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:26:44,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:44,928 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:45,085 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-09 18:26:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:26:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:26:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:45,088 INFO L225 Difference]: With dead ends: 1649 [2021-07-09 18:26:45,088 INFO L226 Difference]: Without dead ends: 1637 [2021-07-09 18:26:45,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:26:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-09 18:26:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-09 18:26:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-09 18:26:45,104 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-09 18:26:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:45,104 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-09 18:26:45,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-09 18:26:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:26:45,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:45,106 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:45,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:45,322 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-07-09 18:26:45,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:45,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080229867] [2021-07-09 18:26:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:45,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:45,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080229867] [2021-07-09 18:26:45,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080229867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:45,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768032252] [2021-07-09 18:26:45,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:45,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:45,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:26:45,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:46,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:26:46,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:26:46,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:26:46,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:26:46,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:26:46,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:26:46,407 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:26:46,416 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:26:46,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:26:46,430 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:26:46,436 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:26:46,441 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:26:46,447 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:26:46,453 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:26:46,459 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:46,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:46,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:26:46,463 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:46,537 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:26:46,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:26:46,539 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:26:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:46,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768032252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:46,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:46,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:26:46,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856065759] [2021-07-09 18:26:46,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:26:46,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:46,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:26:46,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:26:46,595 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:47,406 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-07-09 18:26:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:26:47,406 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:26:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:47,408 INFO L225 Difference]: With dead ends: 1531 [2021-07-09 18:26:47,409 INFO L226 Difference]: Without dead ends: 1516 [2021-07-09 18:26:47,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1266.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-09 18:26:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-07-09 18:26:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-09 18:26:47,424 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-09 18:26:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:47,424 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-09 18:26:47,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-09 18:26:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:26:47,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:47,426 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:47,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:26:47,642 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-07-09 18:26:47,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:47,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887176807] [2021-07-09 18:26:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:48,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887176807] [2021-07-09 18:26:48,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887176807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861012280] [2021-07-09 18:26:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:48,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:26:48,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:48,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:26:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:48,745 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-09 18:26:48,787 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-07-09 18:26:48,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:26:48,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:48,948 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:26:48,949 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:26:48,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:48,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:48,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:48,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:26:48,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:48,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:48,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:48,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:26:48,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:49,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:49,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:49,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:49,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:26:49,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:49,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:49,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:26:49,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:26:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861012280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:49,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:49,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:26:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28082688] [2021-07-09 18:26:49,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:26:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:26:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:26:49,185 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:50,171 INFO L93 Difference]: Finished difference Result 1509 states and 4945 transitions. [2021-07-09 18:26:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:26:50,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:26:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:50,174 INFO L225 Difference]: With dead ends: 1509 [2021-07-09 18:26:50,174 INFO L226 Difference]: Without dead ends: 1494 [2021-07-09 18:26:50,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1502.9ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-07-09 18:26:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1150. [2021-07-09 18:26:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-09 18:26:50,191 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-09 18:26:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:50,191 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-09 18:26:50,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-09 18:26:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:26:50,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:50,193 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:50,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:50,409 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-07-09 18:26:50,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:50,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061587345] [2021-07-09 18:26:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:50,840 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-09 18:26:50,993 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-09 18:26:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:51,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061587345] [2021-07-09 18:26:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061587345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789077418] [2021-07-09 18:26:51,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:51,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:26:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:26:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:26:51,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:26:51,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:26:51,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:26:51,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:26:51,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:26:51,736 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:26:51,746 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:26:51,755 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:26:51,763 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:26:51,770 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:26:51,778 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:26:51,787 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:26:51,795 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:26:51,802 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:51,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:51,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:26:51,807 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:51,830 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:26:51,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:51,831 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:26:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:51,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789077418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:51,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:51,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:26:51,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224934304] [2021-07-09 18:26:51,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:26:51,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:51,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:26:51,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:26:51,863 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:52,915 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2021-07-09 18:26:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:53,496 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-07-09 18:26:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:26:53,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:26:53,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:53,499 INFO L225 Difference]: With dead ends: 1607 [2021-07-09 18:26:53,499 INFO L226 Difference]: Without dead ends: 1592 [2021-07-09 18:26:53,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2105.9ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:26:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-09 18:26:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-07-09 18:26:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-09 18:26:53,516 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-09 18:26:53,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:53,517 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-09 18:26:53,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-09 18:26:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:26:53,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:53,518 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:53,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:26:53,734 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:53,735 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-07-09 18:26:53,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:53,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618018117] [2021-07-09 18:26:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:54,168 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-07-09 18:26:54,374 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-09 18:26:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:54,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:54,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618018117] [2021-07-09 18:26:54,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618018117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:54,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647393452] [2021-07-09 18:26:54,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:54,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:26:54,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:54,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:26:54,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,900 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:26:54,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:26:54,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:54,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:26:54,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:54,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-09 18:26:54,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,939 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:26:54,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:26:54,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,951 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:26:54,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:26:54,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,962 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:26:54,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:26:54,963 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,973 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:26:54,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:26:54,974 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:26:55,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-07-09 18:26:55,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,017 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:26:55,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-09 18:26:55,018 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,027 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:26:55,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:26:55,027 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,036 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:26:55,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:26:55,037 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:26:55,051 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:55,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:26:55,064 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:55,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-09 18:26:55,077 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,088 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:26:55,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-09 18:26:55,090 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:55,096 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:26:55,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:26:55,097 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:55,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:55,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:26:55,179 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-07-09 18:26:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:55,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647393452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:55,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:55,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:26:55,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921079123] [2021-07-09 18:26:55,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:26:55,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:55,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:26:55,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:26:55,381 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:56,138 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-07-09 18:26:56,430 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-09 18:26:56,554 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-09 18:26:56,860 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 18:26:57,019 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-09 18:26:57,297 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-09 18:26:57,463 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-09 18:26:57,722 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-07-09 18:26:57,893 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 18:26:58,444 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-07-09 18:26:58,706 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-07-09 18:26:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:58,830 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-07-09 18:26:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:26:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:26:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:58,834 INFO L225 Difference]: With dead ends: 1843 [2021-07-09 18:26:58,834 INFO L226 Difference]: Without dead ends: 1828 [2021-07-09 18:26:58,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3686.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:26:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-07-09 18:26:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-07-09 18:26:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-09 18:26:58,852 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-09 18:26:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:58,853 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-09 18:26:58,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-09 18:26:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:26:58,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:58,854 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:59,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:59,070 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:59,070 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-07-09 18:26:59,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:59,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029161425] [2021-07-09 18:26:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:59,517 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 18:26:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:59,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:59,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029161425] [2021-07-09 18:26:59,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029161425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:59,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148176867] [2021-07-09 18:26:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:59,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:26:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:00,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:27:00,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:27:00,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:27:00,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:27:00,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:27:00,351 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:27:00,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:27:00,370 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:27:00,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:27:00,387 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:27:00,396 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:27:00,404 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:27:00,411 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:27:00,420 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:27:00,427 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:00,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:00,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:27:00,433 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,457 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:27:00,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:00,460 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:27:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:00,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148176867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:00,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:00,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:27:00,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686882707] [2021-07-09 18:27:00,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:27:00,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:00,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:27:00,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:27:00,492 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:01,731 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-07-09 18:27:01,949 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-09 18:27:02,094 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-09 18:27:02,224 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-09 18:27:02,576 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-07-09 18:27:02,746 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-07-09 18:27:03,053 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:27:03,197 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-07-09 18:27:03,690 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 18:27:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:04,001 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-07-09 18:27:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:27:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:04,004 INFO L225 Difference]: With dead ends: 1877 [2021-07-09 18:27:04,004 INFO L226 Difference]: Without dead ends: 1862 [2021-07-09 18:27:04,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3558.7ms TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:27:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-07-09 18:27:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-07-09 18:27:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-09 18:27:04,021 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-09 18:27:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:04,021 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-09 18:27:04,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-09 18:27:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:04,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:04,023 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:04,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:04,239 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-07-09 18:27:04,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:04,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980459288] [2021-07-09 18:27:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:04,567 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-07-09 18:27:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:04,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:04,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980459288] [2021-07-09 18:27:04,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980459288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:04,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773713773] [2021-07-09 18:27:04,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:04,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:04,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:04,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:04,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:05,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,457 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:27:05,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:27:05,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,485 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-09 18:27:05,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:27:05,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,515 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:27:05,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-07-09 18:27:05,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,552 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-07-09 18:27:05,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-07-09 18:27:05,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,574 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:27:05,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-09 18:27:05,575 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,592 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:27:05,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:27:05,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,617 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-07-09 18:27:05,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-07-09 18:27:05,619 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,635 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:27:05,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:27:05,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,660 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-09 18:27:05,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:27:05,661 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,687 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:27:05,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:27:05,691 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,707 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:27:05,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:27:05,708 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,732 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:27:05,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-09 18:27:05,733 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:05,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-09 18:27:05,765 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,781 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:27:05,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:27:05,782 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,796 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:27:05,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:27:05,797 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,806 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:27:05,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:27:05,807 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,929 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-07-09 18:27:05,929 INFO L628 ElimStorePlain]: treesize reduction 126, result has 51.4 percent of original size [2021-07-09 18:27:05,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:27:05,931 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-07-09 18:27:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:06,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773713773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:06,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:06,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-09 18:27:06,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834937694] [2021-07-09 18:27:06,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:27:06,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:27:06,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:27:06,093 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:06,868 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-07-09 18:27:07,512 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 18:27:07,639 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-09 18:27:07,851 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2021-07-09 18:27:07,988 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-07-09 18:27:08,349 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-09 18:27:08,898 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-07-09 18:27:09,047 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 18:27:09,217 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-09 18:27:09,564 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-09 18:27:09,889 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-07-09 18:27:10,059 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-07-09 18:27:10,329 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-09 18:27:10,621 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-09 18:27:10,748 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-07-09 18:27:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:10,884 INFO L93 Difference]: Finished difference Result 2051 states and 6324 transitions. [2021-07-09 18:27:10,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:27:10,884 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:10,888 INFO L225 Difference]: With dead ends: 2051 [2021-07-09 18:27:10,888 INFO L226 Difference]: Without dead ends: 2006 [2021-07-09 18:27:10,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 4919.2ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:27:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-07-09 18:27:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-07-09 18:27:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-07-09 18:27:10,909 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-07-09 18:27:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:10,909 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-07-09 18:27:10,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-07-09 18:27:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:10,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:10,911 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:11,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-07-09 18:27:11,125 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-07-09 18:27:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:11,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240919322] [2021-07-09 18:27:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:11,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:11,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240919322] [2021-07-09 18:27:11,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240919322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:11,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191390221] [2021-07-09 18:27:11,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:11,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:11,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:27:12,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:12,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:27:12,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:12,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:27:12,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:27:12,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:27:12,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:27:12,192 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:27:12,198 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:27:12,203 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:12,207 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:27:12,213 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:27:12,218 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:27:12,223 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:12,227 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,301 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:27:12,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:27:12,302 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:27:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:12,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191390221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:12,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:12,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:27:12,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904914179] [2021-07-09 18:27:12,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:27:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:27:12,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:27:12,360 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:13,331 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-07-09 18:27:13,613 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-07-09 18:27:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:14,420 INFO L93 Difference]: Finished difference Result 1960 states and 6315 transitions. [2021-07-09 18:27:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:27:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:14,424 INFO L225 Difference]: With dead ends: 1960 [2021-07-09 18:27:14,424 INFO L226 Difference]: Without dead ends: 1945 [2021-07-09 18:27:14,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2246.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:27:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-09 18:27:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-07-09 18:27:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.3202247191011236) internal successors, (4728), 1424 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4728 transitions. [2021-07-09 18:27:14,444 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4728 transitions. Word has length 26 [2021-07-09 18:27:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:14,444 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4728 transitions. [2021-07-09 18:27:14,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4728 transitions. [2021-07-09 18:27:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:14,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:14,446 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:14,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:14,661 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-07-09 18:27:14,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:14,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385666480] [2021-07-09 18:27:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:15,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:15,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385666480] [2021-07-09 18:27:15,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385666480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:15,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215608296] [2021-07-09 18:27:15,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:15,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:15,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:27:15,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:15,679 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:27:15,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:15,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:15,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-07-09 18:27:15,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:15,911 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-09 18:27:15,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:15,934 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:27:15,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-09 18:27:15,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,069 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-09 18:27:16,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:16,091 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:27:16,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-07-09 18:27:16,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,220 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 18:27:16,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:16,243 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:27:16,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-07-09 18:27:16,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,383 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:27:16,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:16,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-07-09 18:27:16,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,523 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:27:16,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:16,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-07-09 18:27:16,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,660 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:27:16,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:16,678 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:27:16,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 18:27:16,679 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,815 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 18:27:16,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:16,832 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:27:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:27:16,833 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,957 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 18:27:16,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:27:16,974 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-07-09 18:27:17,251 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-09 18:27:17,462 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-07-09 18:27:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:17,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215608296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:17,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:17,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:27:17,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165377160] [2021-07-09 18:27:17,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:27:17,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:17,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:27:17,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:27:17,572 INFO L87 Difference]: Start difference. First operand 1425 states and 4728 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:18,655 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-07-09 18:27:19,009 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-07-09 18:27:19,366 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-07-09 18:27:19,664 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2021-07-09 18:27:20,023 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:27:20,519 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-09 18:27:20,954 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-07-09 18:27:21,107 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-09 18:27:21,455 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-07-09 18:27:21,806 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-07-09 18:27:22,306 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-07-09 18:27:22,657 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2021-07-09 18:27:23,251 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-07-09 18:27:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:23,332 INFO L93 Difference]: Finished difference Result 2026 states and 6474 transitions. [2021-07-09 18:27:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:27:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:23,335 INFO L225 Difference]: With dead ends: 2026 [2021-07-09 18:27:23,336 INFO L226 Difference]: Without dead ends: 2011 [2021-07-09 18:27:23,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 6237.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:27:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-07-09 18:27:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1444. [2021-07-09 18:27:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.324324324324324) internal successors, (4797), 1443 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4797 transitions. [2021-07-09 18:27:23,358 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4797 transitions. Word has length 26 [2021-07-09 18:27:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:23,358 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4797 transitions. [2021-07-09 18:27:23,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4797 transitions. [2021-07-09 18:27:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:23,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:23,360 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:23,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-09 18:27:23,576 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1506197498, now seen corresponding path program 9 times [2021-07-09 18:27:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:23,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658045135] [2021-07-09 18:27:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:23,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:23,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658045135] [2021-07-09 18:27:23,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658045135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:23,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408163092] [2021-07-09 18:27:23,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:24,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:27:24,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:24,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:24,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:24,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:24,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:27:24,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:24,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:24,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:24,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:27:24,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:24,614 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-09 18:27:24,614 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-07-09 18:27:24,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:24,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:24,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:24,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:24,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:27:24,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:24,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:24,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:24,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:24,662 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:24,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:24,690 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-07-09 18:27:24,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:27:24,692 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-07-09 18:27:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:24,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408163092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:24,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:24,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:27:24,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527761984] [2021-07-09 18:27:24,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:27:24,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:24,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:27:24,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:27:24,735 INFO L87 Difference]: Start difference. First operand 1444 states and 4797 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:25,313 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-07-09 18:27:25,710 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:27:25,903 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-07-09 18:27:26,274 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-07-09 18:27:26,568 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 18:27:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:26,623 INFO L93 Difference]: Finished difference Result 2027 states and 6512 transitions. [2021-07-09 18:27:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:27:26,624 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:26,627 INFO L225 Difference]: With dead ends: 2027 [2021-07-09 18:27:26,627 INFO L226 Difference]: Without dead ends: 2012 [2021-07-09 18:27:26,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2221.0ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:27:26,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-07-09 18:27:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1454. [2021-07-09 18:27:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3269098417068137) internal successors, (4834), 1453 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4834 transitions. [2021-07-09 18:27:26,647 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4834 transitions. Word has length 26 [2021-07-09 18:27:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:26,647 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4834 transitions. [2021-07-09 18:27:26,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4834 transitions. [2021-07-09 18:27:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:26,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:26,649 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:26,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:26,865 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 10 times [2021-07-09 18:27:26,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:26,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664424283] [2021-07-09 18:27:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:27,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:27,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664424283] [2021-07-09 18:27:27,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664424283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:27,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531526034] [2021-07-09 18:27:27,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:27,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:27,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:27,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:27,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:27:27,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:27:27,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:27,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:27:27,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,630 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:27,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:27:27,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,643 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:27:27,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:27:27,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,654 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:27:27,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:27:27,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:27,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-09 18:27:27,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,678 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:27:27,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:27:27,679 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:27,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:27:27,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,706 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:27:27,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:27:27,707 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:27,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-09 18:27:27,723 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,734 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:27:27,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:27:27,734 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,745 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:27:27,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:27:27,746 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,758 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:27:27,760 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,770 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:27:27,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:27:27,771 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:27,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:27:27,784 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:27,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:27,792 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:27,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-09 18:27:27,793 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:27,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:27:27,868 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-09 18:27:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:28,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531526034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:28,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:28,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:27:28,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214421876] [2021-07-09 18:27:28,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:27:28,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:28,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:27:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:27:28,085 INFO L87 Difference]: Start difference. First operand 1454 states and 4834 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:30,109 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-09 18:27:30,412 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-07-09 18:27:30,643 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 18:27:30,882 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-09 18:27:31,032 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:27:31,242 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-07-09 18:27:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:31,377 INFO L93 Difference]: Finished difference Result 2385 states and 7601 transitions. [2021-07-09 18:27:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:27:31,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:31,381 INFO L225 Difference]: With dead ends: 2385 [2021-07-09 18:27:31,381 INFO L226 Difference]: Without dead ends: 2355 [2021-07-09 18:27:31,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3396.2ms TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:27:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-07-09 18:27:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1467. [2021-07-09 18:27:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.3342428376534787) internal successors, (4888), 1466 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4888 transitions. [2021-07-09 18:27:31,405 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4888 transitions. Word has length 26 [2021-07-09 18:27:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:31,405 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4888 transitions. [2021-07-09 18:27:31,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4888 transitions. [2021-07-09 18:27:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:31,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:31,408 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:31,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-09 18:27:31,623 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 11 times [2021-07-09 18:27:31,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:31,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560230399] [2021-07-09 18:27:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:32,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560230399] [2021-07-09 18:27:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560230399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329017303] [2021-07-09 18:27:32,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:32,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:27:32,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:32,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:32,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:32,567 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:27:32,750 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-07-09 18:27:32,807 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_37], 2=[v_prenex_39, v_prenex_38]} [2021-07-09 18:27:32,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:27:32,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:32,923 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:27:32,923 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.0 percent of original size [2021-07-09 18:27:32,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:32,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:27:32,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:32,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:32,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:32,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:32,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:32,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:33,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:33,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:27:33,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:33,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:33,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:33,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:27:33,071 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:205, output treesize:51 [2021-07-09 18:27:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:33,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329017303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:33,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:33,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:27:33,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130140364] [2021-07-09 18:27:33,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:27:33,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:27:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:27:33,131 INFO L87 Difference]: Start difference. First operand 1467 states and 4888 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:33,775 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-09 18:27:34,002 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 18:27:34,324 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-09 18:27:34,586 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-09 18:27:35,080 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-09 18:27:35,472 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-07-09 18:27:35,668 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-09 18:27:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:35,869 INFO L93 Difference]: Finished difference Result 1957 states and 6396 transitions. [2021-07-09 18:27:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:27:35,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:35,873 INFO L225 Difference]: With dead ends: 1957 [2021-07-09 18:27:35,873 INFO L226 Difference]: Without dead ends: 1942 [2021-07-09 18:27:35,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 3064.4ms TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:27:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-07-09 18:27:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1470. [2021-07-09 18:27:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.3356024506466984) internal successors, (4900), 1469 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4900 transitions. [2021-07-09 18:27:35,893 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4900 transitions. Word has length 26 [2021-07-09 18:27:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:35,893 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4900 transitions. [2021-07-09 18:27:35,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4900 transitions. [2021-07-09 18:27:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:35,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:35,896 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:36,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-09 18:27:36,113 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:36,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1300110838, now seen corresponding path program 12 times [2021-07-09 18:27:36,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:36,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354092464] [2021-07-09 18:27:36,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:36,464 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-09 18:27:36,599 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-09 18:27:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:36,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:36,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354092464] [2021-07-09 18:27:36,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354092464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:36,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376725166] [2021-07-09 18:27:36,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:36,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:27:36,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:36,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:36,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:36,991 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-09 18:27:37,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:37,069 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:37,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:27:37,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:37,218 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:27:37,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:37,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:27:37,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:37,387 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:27:37,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:37,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:27:37,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:37,538 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:27:37,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:37,551 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:37,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:27:37,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:37,657 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:27:37,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:37,669 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:37,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:27:37,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:37,772 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:27:37,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:37,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:27:37,787 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:37,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:37,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:27:37,895 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:37,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:37,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:37,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:27:38,002 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:38,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:38,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:27:38,096 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:27:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:38,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376725166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:38,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:38,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:27:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118276061] [2021-07-09 18:27:38,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:27:38,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:38,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:27:38,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:27:38,284 INFO L87 Difference]: Start difference. First operand 1470 states and 4900 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:38,612 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-09 18:27:39,022 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-07-09 18:27:39,374 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-09 18:27:39,631 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:27:39,916 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-07-09 18:27:40,116 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:27:40,301 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-07-09 18:27:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:40,379 INFO L93 Difference]: Finished difference Result 2349 states and 7518 transitions. [2021-07-09 18:27:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:27:40,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:40,383 INFO L225 Difference]: With dead ends: 2349 [2021-07-09 18:27:40,384 INFO L226 Difference]: Without dead ends: 2319 [2021-07-09 18:27:40,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2462.8ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:27:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-09 18:27:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1476. [2021-07-09 18:27:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3403389830508474) internal successors, (4927), 1475 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4927 transitions. [2021-07-09 18:27:40,417 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4927 transitions. Word has length 26 [2021-07-09 18:27:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:40,417 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4927 transitions. [2021-07-09 18:27:40,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:40,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4927 transitions. [2021-07-09 18:27:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:40,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:40,420 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:40,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:40,639 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-07-09 18:27:40,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:40,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607929191] [2021-07-09 18:27:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:41,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:41,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607929191] [2021-07-09 18:27:41,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607929191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:41,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149523607] [2021-07-09 18:27:41,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:41,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:27:41,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:41,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:27:41,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:27:41,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-07-09 18:27:41,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-09 18:27:41,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-07-09 18:27:41,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-09 18:27:41,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-09 18:27:41,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:27:41,466 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-09 18:27:41,475 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-07-09 18:27:41,485 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:27:41,494 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-07-09 18:27:41,504 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:27:41,513 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-09 18:27:41,523 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-09 18:27:41,533 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-09 18:27:41,542 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:41,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:41,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:27:41,548 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,591 INFO L628 ElimStorePlain]: treesize reduction 48, result has 49.5 percent of original size [2021-07-09 18:27:41,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:41,592 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:921, output treesize:47 [2021-07-09 18:27:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:41,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149523607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:41,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:41,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:27:41,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207048503] [2021-07-09 18:27:41,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:27:41,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:41,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:27:41,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:27:41,675 INFO L87 Difference]: Start difference. First operand 1476 states and 4927 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:42,223 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-09 18:27:42,513 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 18:27:42,688 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-09 18:27:42,877 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-07-09 18:27:43,471 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-09 18:27:43,896 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-09 18:27:44,122 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-07-09 18:27:44,655 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-07-09 18:27:45,328 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-09 18:27:45,504 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-07-09 18:27:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:45,803 INFO L93 Difference]: Finished difference Result 3196 states and 9983 transitions. [2021-07-09 18:27:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:27:45,804 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:45,809 INFO L225 Difference]: With dead ends: 3196 [2021-07-09 18:27:45,809 INFO L226 Difference]: Without dead ends: 3109 [2021-07-09 18:27:45,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 4073.5ms TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:27:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-07-09 18:27:45,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1509. [2021-07-09 18:27:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.343501326259947) internal successors, (5042), 1508 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5042 transitions. [2021-07-09 18:27:45,837 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5042 transitions. Word has length 26 [2021-07-09 18:27:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:45,837 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5042 transitions. [2021-07-09 18:27:45,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5042 transitions. [2021-07-09 18:27:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:45,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:45,839 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:46,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-07-09 18:27:46,055 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:46,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-07-09 18:27:46,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:46,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432230120] [2021-07-09 18:27:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:46,361 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-09 18:27:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:46,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:46,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432230120] [2021-07-09 18:27:46,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432230120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:46,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177428908] [2021-07-09 18:27:46,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:46,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:46,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:46,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:27:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:47,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:27:47,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:27:47,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:27:47,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-09 18:27:47,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:27:47,276 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:27:47,284 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-09 18:27:47,293 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:27:47,301 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:27:47,309 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-09 18:27:47,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:27:47,324 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:27:47,332 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:27:47,340 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:27:47,348 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:27:47,354 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:27:47,359 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,389 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-09 18:27:47,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:47,391 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-07-09 18:27:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:47,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177428908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:47,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:47,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:27:47,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835933655] [2021-07-09 18:27:47,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:27:47,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:27:47,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:27:47,427 INFO L87 Difference]: Start difference. First operand 1509 states and 5042 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:47,962 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-07-09 18:27:48,283 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-09 18:27:48,448 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-07-09 18:27:48,912 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-09 18:27:49,382 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-07-09 18:27:49,680 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-07-09 18:27:50,179 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-07-09 18:27:50,332 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-09 18:27:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:50,579 INFO L93 Difference]: Finished difference Result 2965 states and 9388 transitions. [2021-07-09 18:27:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:27:50,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:50,585 INFO L225 Difference]: With dead ends: 2965 [2021-07-09 18:27:50,586 INFO L226 Difference]: Without dead ends: 2920 [2021-07-09 18:27:50,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3283.5ms TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:27:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-07-09 18:27:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1512. [2021-07-09 18:27:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.345466578424884) internal successors, (5055), 1511 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5055 transitions. [2021-07-09 18:27:50,634 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5055 transitions. Word has length 26 [2021-07-09 18:27:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:50,635 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5055 transitions. [2021-07-09 18:27:50,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5055 transitions. [2021-07-09 18:27:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:50,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:50,637 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:50,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-07-09 18:27:50,854 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-07-09 18:27:50,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:50,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362710898] [2021-07-09 18:27:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:51,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:51,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362710898] [2021-07-09 18:27:51,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362710898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:51,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470825609] [2021-07-09 18:27:51,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:51,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:27:51,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:27:51,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,823 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:27:51,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-07-09 18:27:51,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:51,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-09 18:27:51,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,884 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:27:51,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-09 18:27:51,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,915 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:27:51,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:27:51,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,936 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:51,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-07-09 18:27:51,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,963 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:27:51,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-09 18:27:51,964 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,989 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-09 18:27:51,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-07-09 18:27:51,990 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,007 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:52,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:27:52,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,024 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:52,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:27:52,025 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,041 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:52,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:27:52,042 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,058 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:52,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:27:52,059 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,112 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:27:52,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-09 18:27:52,114 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,129 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:52,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:27:52,130 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,146 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:52,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:27:52,146 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,161 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:52,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:27:52,162 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:52,171 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:27:52,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:27:52,172 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,277 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-09 18:27:52,277 INFO L628 ElimStorePlain]: treesize reduction 69, result has 64.2 percent of original size [2021-07-09 18:27:52,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:27:52,279 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-09 18:27:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:52,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470825609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:52,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:52,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:27:52,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139445177] [2021-07-09 18:27:52,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:27:52,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:27:52,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:27:52,418 INFO L87 Difference]: Start difference. First operand 1512 states and 5055 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:52,895 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-09 18:27:53,008 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-07-09 18:27:53,432 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-07-09 18:27:53,658 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-07-09 18:27:53,995 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-09 18:27:54,176 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-07-09 18:27:54,423 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-07-09 18:27:55,501 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-07-09 18:27:55,680 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-09 18:27:55,802 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-07-09 18:27:55,987 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-09 18:27:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:56,634 INFO L93 Difference]: Finished difference Result 3428 states and 10667 transitions. [2021-07-09 18:27:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:27:56,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:56,640 INFO L225 Difference]: With dead ends: 3428 [2021-07-09 18:27:56,641 INFO L226 Difference]: Without dead ends: 3368 [2021-07-09 18:27:56,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4093.1ms TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:27:56,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-07-09 18:27:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1525. [2021-07-09 18:27:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.356299212598425) internal successors, (5115), 1524 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5115 transitions. [2021-07-09 18:27:56,670 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5115 transitions. Word has length 26 [2021-07-09 18:27:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:56,670 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 5115 transitions. [2021-07-09 18:27:56,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5115 transitions. [2021-07-09 18:27:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:56,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:56,672 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:56,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-07-09 18:27:56,888 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-07-09 18:27:56,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:56,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101154960] [2021-07-09 18:27:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:57,239 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-07-09 18:27:57,465 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-07-09 18:27:57,671 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-09 18:27:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:57,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:57,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101154960] [2021-07-09 18:27:57,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101154960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:57,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729534348] [2021-07-09 18:27:57,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:57,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:57,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:58,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:27:58,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:58,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:27:58,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:27:58,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:27:58,199 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:27:58,204 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:58,209 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:58,215 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:27:58,220 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:27:58,225 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:27:58,231 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:58,236 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:27:58,241 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:27:58,246 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:27:58,249 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,322 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:27:58,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:27:58,323 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:27:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:58,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729534348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:58,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:58,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:27:58,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811196963] [2021-07-09 18:27:58,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:27:58,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:58,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:27:58,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:27:58,379 INFO L87 Difference]: Start difference. First operand 1525 states and 5115 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:59,176 INFO L93 Difference]: Finished difference Result 1908 states and 6274 transitions. [2021-07-09 18:27:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:27:59,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:27:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:59,179 INFO L225 Difference]: With dead ends: 1908 [2021-07-09 18:27:59,179 INFO L226 Difference]: Without dead ends: 1893 [2021-07-09 18:27:59,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1595.2ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:27:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-07-09 18:27:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1533. [2021-07-09 18:27:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.352480417754569) internal successors, (5136), 1532 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5136 transitions. [2021-07-09 18:27:59,200 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5136 transitions. Word has length 26 [2021-07-09 18:27:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:59,200 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5136 transitions. [2021-07-09 18:27:59,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5136 transitions. [2021-07-09 18:27:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:27:59,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:59,203 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:59,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-09 18:27:59,417 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-07-09 18:27:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:59,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793805009] [2021-07-09 18:27:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:59,718 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-07-09 18:28:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:00,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:00,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793805009] [2021-07-09 18:28:00,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793805009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:00,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361894123] [2021-07-09 18:28:00,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:00,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:00,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:00,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:28:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:00,351 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:28:00,446 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_60, v_prenex_62], 3=[A, v_prenex_54, v_prenex_64, v_prenex_58, v_prenex_56, v_prenex_66]} [2021-07-09 18:28:00,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:00,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:28:00,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:00,620 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-07-09 18:28:00,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:00,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:00,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:28:00,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:00,791 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 18:28:00,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:00,815 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:28:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-09 18:28:00,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:00,970 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:28:00,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:00,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:00,993 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:28:00,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:28:00,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:01,135 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-09 18:28:01,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:01,156 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:28:01,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:28:01,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:01,295 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-09 18:28:01,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:01,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:01,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:01,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-09 18:28:01,318 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:01,453 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:28:01,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:01,490 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:28:01,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-09 18:28:01,492 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:01,609 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-09 18:28:01,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:01,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:01,628 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:28:01,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:28:01,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:01,762 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:28:01,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:01,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:01,777 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:391, output treesize:457 [2021-07-09 18:28:02,095 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-07-09 18:28:02,313 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-09 18:28:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:02,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361894123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:02,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:02,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:28:02,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208755630] [2021-07-09 18:28:02,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:28:02,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:02,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:28:02,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:28:02,412 INFO L87 Difference]: Start difference. First operand 1533 states and 5136 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:03,370 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2021-07-09 18:28:03,767 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:28:04,289 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-07-09 18:28:04,458 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:28:04,850 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-09 18:28:05,289 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-07-09 18:28:05,630 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-07-09 18:28:05,856 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-07-09 18:28:06,336 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-07-09 18:28:06,564 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2021-07-09 18:28:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:06,621 INFO L93 Difference]: Finished difference Result 2211 states and 7083 transitions. [2021-07-09 18:28:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:28:06,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:06,626 INFO L225 Difference]: With dead ends: 2211 [2021-07-09 18:28:06,626 INFO L226 Difference]: Without dead ends: 2181 [2021-07-09 18:28:06,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 4856.2ms TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:28:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-07-09 18:28:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1518. [2021-07-09 18:28:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3513513513513513) internal successors, (5084), 1517 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5084 transitions. [2021-07-09 18:28:06,650 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5084 transitions. Word has length 26 [2021-07-09 18:28:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:06,650 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5084 transitions. [2021-07-09 18:28:06,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5084 transitions. [2021-07-09 18:28:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:06,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:06,653 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:06,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:06,869 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 15 times [2021-07-09 18:28:06,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:06,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403967215] [2021-07-09 18:28:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:07,085 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-09 18:28:07,361 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-09 18:28:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:07,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:07,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403967215] [2021-07-09 18:28:07,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403967215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:07,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878968213] [2021-07-09 18:28:07,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:07,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:28:07,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:28:07,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:07,888 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:07,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:28:07,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:07,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:28:07,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,920 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:28:07,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:28:07,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,939 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:28:07,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:28:07,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:07,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:28:07,962 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:07,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:28:07,980 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,990 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:07,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:28:07,991 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,000 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:08,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:08,001 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,010 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:08,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:08,011 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,031 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:08,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:28:08,034 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,055 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:08,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:28:08,059 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,069 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:08,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:08,070 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,079 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:08,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:08,080 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,089 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:08,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:08,090 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,100 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:08,100 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,116 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:08,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:28:08,118 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,240 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-09 18:28:08,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:08,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:08,255 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:430 [2021-07-09 18:28:08,490 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-07-09 18:28:08,711 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:28:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:08,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878968213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:08,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:08,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:28:08,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720781162] [2021-07-09 18:28:08,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:28:08,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:08,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:28:08,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:28:08,833 INFO L87 Difference]: Start difference. First operand 1518 states and 5084 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:09,719 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2021-07-09 18:28:10,108 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-07-09 18:28:10,504 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-07-09 18:28:10,694 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-07-09 18:28:10,952 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 58 [2021-07-09 18:28:11,119 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-09 18:28:11,362 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-09 18:28:11,635 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:28:11,911 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-09 18:28:12,193 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-07-09 18:28:12,513 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-07-09 18:28:12,758 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-07-09 18:28:13,083 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-07-09 18:28:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:13,161 INFO L93 Difference]: Finished difference Result 2207 states and 7076 transitions. [2021-07-09 18:28:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:28:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:13,165 INFO L225 Difference]: With dead ends: 2207 [2021-07-09 18:28:13,165 INFO L226 Difference]: Without dead ends: 2192 [2021-07-09 18:28:13,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4866.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:28:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-07-09 18:28:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1522. [2021-07-09 18:28:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.356344510190664) internal successors, (5105), 1521 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5105 transitions. [2021-07-09 18:28:13,191 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5105 transitions. Word has length 26 [2021-07-09 18:28:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:13,191 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5105 transitions. [2021-07-09 18:28:13,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5105 transitions. [2021-07-09 18:28:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:13,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:13,193 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:13,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:13,409 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:13,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 16 times [2021-07-09 18:28:13,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:13,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344720202] [2021-07-09 18:28:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:13,800 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-07-09 18:28:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:13,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:13,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344720202] [2021-07-09 18:28:13,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344720202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:13,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38826367] [2021-07-09 18:28:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:13,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:13,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:13,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:14,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:14,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:28:14,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:14,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:28:14,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:14,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:28:14,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:14,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:28:14,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,289 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:14,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:28:14,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,298 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:14,298 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,307 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:14,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:14,307 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,316 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:14,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:14,316 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:14,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:28:14,330 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,341 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:14,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:28:14,342 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,354 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:14,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:28:14,355 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:14,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:14,364 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,374 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:14,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:28:14,375 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:14,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:14,386 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,394 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:14,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:28:14,395 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:14,401 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:14,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:14,401 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:14,515 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-07-09 18:28:14,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:14,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:14,521 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-07-09 18:28:14,698 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-07-09 18:28:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:14,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38826367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:14,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:14,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:28:14,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516001909] [2021-07-09 18:28:14,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:28:14,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:14,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:28:14,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:28:14,796 INFO L87 Difference]: Start difference. First operand 1522 states and 5105 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:15,221 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-07-09 18:28:15,559 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 18:28:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:15,593 INFO L93 Difference]: Finished difference Result 2055 states and 6709 transitions. [2021-07-09 18:28:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:28:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:15,597 INFO L225 Difference]: With dead ends: 2055 [2021-07-09 18:28:15,598 INFO L226 Difference]: Without dead ends: 2040 [2021-07-09 18:28:15,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1373.4ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:28:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-07-09 18:28:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1529. [2021-07-09 18:28:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-07-09 18:28:15,629 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-07-09 18:28:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:15,629 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-07-09 18:28:15,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-07-09 18:28:15,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:15,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:15,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:15,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:15,847 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:15,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:15,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-07-09 18:28:15,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:15,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837617654] [2021-07-09 18:28:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:16,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:16,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837617654] [2021-07-09 18:28:16,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837617654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:16,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50522897] [2021-07-09 18:28:16,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:16,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:28:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:28:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:16,705 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-09 18:28:16,927 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-07-09 18:28:17,022 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_76], 2=[A, v_prenex_75]} [2021-07-09 18:28:17,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:17,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:17,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:17,133 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-09 18:28:17,133 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:28:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:17,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:17,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:17,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:17,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:17,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:17,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:17,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:17,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:17,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:17,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:17,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:17,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:17,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:17,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:28:17,229 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:28:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:17,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50522897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:17,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:17,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:28:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001640944] [2021-07-09 18:28:17,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:28:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:28:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:28:17,287 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:17,975 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-07-09 18:28:18,359 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:28:18,671 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-09 18:28:18,840 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-07-09 18:28:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:18,947 INFO L93 Difference]: Finished difference Result 2067 states and 6781 transitions. [2021-07-09 18:28:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:28:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:18,950 INFO L225 Difference]: With dead ends: 2067 [2021-07-09 18:28:18,950 INFO L226 Difference]: Without dead ends: 2052 [2021-07-09 18:28:18,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2221.3ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:28:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-07-09 18:28:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1532. [2021-07-09 18:28:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.357282821685173) internal successors, (5140), 1531 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5140 transitions. [2021-07-09 18:28:19,019 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5140 transitions. Word has length 26 [2021-07-09 18:28:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:19,020 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5140 transitions. [2021-07-09 18:28:19,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5140 transitions. [2021-07-09 18:28:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:19,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:19,022 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:19,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-07-09 18:28:19,222 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-07-09 18:28:19,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:19,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108276399] [2021-07-09 18:28:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:19,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:19,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108276399] [2021-07-09 18:28:19,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108276399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:19,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741399035] [2021-07-09 18:28:19,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:19,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:28:19,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:19,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:20,150 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-09 18:28:20,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:20,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:20,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:28:20,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,603 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2021-07-09 18:28:20,603 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-07-09 18:28:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:20,627 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:20,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:28:20,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,762 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-09 18:28:20,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:20,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:20,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:28:20,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,915 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-09 18:28:20,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:20,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:20,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:28:20,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:21,206 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-07-09 18:28:21,207 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-07-09 18:28:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:21,227 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:28:21,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:28:21,228 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:21,348 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 18:28:21,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:21,370 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:21,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:28:21,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:21,491 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-09 18:28:21,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:21,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:21,511 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:21,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:28:21,515 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:21,629 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:28:21,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:21,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:21,648 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:28:21,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:28:21,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:21,761 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 18:28:21,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:21,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:21,779 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-07-09 18:28:21,975 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 18:28:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:22,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741399035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:22,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:22,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:28:22,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349386556] [2021-07-09 18:28:22,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:28:22,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:28:22,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:28:22,076 INFO L87 Difference]: Start difference. First operand 1532 states and 5140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:22,710 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-09 18:28:23,013 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-07-09 18:28:23,533 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-07-09 18:28:23,805 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-07-09 18:28:24,144 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 18:28:24,689 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-07-09 18:28:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:24,740 INFO L93 Difference]: Finished difference Result 2080 states and 6806 transitions. [2021-07-09 18:28:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:28:24,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:24,744 INFO L225 Difference]: With dead ends: 2080 [2021-07-09 18:28:24,744 INFO L226 Difference]: Without dead ends: 2065 [2021-07-09 18:28:24,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3363.6ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-07-09 18:28:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1529. [2021-07-09 18:28:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-07-09 18:28:24,766 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-07-09 18:28:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:24,766 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-07-09 18:28:24,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-07-09 18:28:24,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:24,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:24,769 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:24,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:24,984 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-07-09 18:28:24,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:24,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593624294] [2021-07-09 18:28:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:25,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593624294] [2021-07-09 18:28:25,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593624294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634781053] [2021-07-09 18:28:25,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:28:25,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:25,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:25,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:25,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:25,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:25,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:25,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:25,897 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:28:25,902 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:28:25,908 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:25,914 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:25,920 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:25,952 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:25,957 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:28:25,963 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:25,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:25,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:25,966 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:26,035 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:28:26,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:28:26,037 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:28:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:26,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634781053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:26,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:26,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:28:26,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088192251] [2021-07-09 18:28:26,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:28:26,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:26,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:28:26,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:28:26,084 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:26,962 INFO L93 Difference]: Finished difference Result 1986 states and 6507 transitions. [2021-07-09 18:28:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:28:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:26,965 INFO L225 Difference]: With dead ends: 1986 [2021-07-09 18:28:26,965 INFO L226 Difference]: Without dead ends: 1965 [2021-07-09 18:28:26,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1211.4ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:28:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-07-09 18:28:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1570. [2021-07-09 18:28:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3524537922243467) internal successors, (5260), 1569 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5260 transitions. [2021-07-09 18:28:26,988 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5260 transitions. Word has length 26 [2021-07-09 18:28:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:26,988 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5260 transitions. [2021-07-09 18:28:26,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5260 transitions. [2021-07-09 18:28:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:26,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:26,990 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:27,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-09 18:28:27,205 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-07-09 18:28:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:27,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792275187] [2021-07-09 18:28:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:27,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:27,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792275187] [2021-07-09 18:28:27,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792275187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:27,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532198545] [2021-07-09 18:28:27,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:27,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:27,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:28:27,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:28,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:28,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:28:28,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,035 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:28,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:28,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,044 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:28,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:28,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,062 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:28:28,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:28:28,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,083 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:28:28,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,096 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:28,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:28:28,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,115 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:28,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:28:28,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,126 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:28,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:28,127 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,147 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:28:28,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:28:28,150 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,168 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:28:28,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:28:28,170 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,179 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:28:28,180 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,189 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:28,190 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,200 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:28,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:28,201 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:28:28,220 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:28,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:28:28,237 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,243 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:28:28,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:28,244 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,367 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-09 18:28:28,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:28,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:28,380 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:407 [2021-07-09 18:28:28,620 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-09 18:28:28,836 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:28:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:28,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532198545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:28,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:28,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:28:28,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941537401] [2021-07-09 18:28:28,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:28:28,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:28:28,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:28:28,984 INFO L87 Difference]: Start difference. First operand 1570 states and 5260 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:29,679 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:28:30,047 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-09 18:28:30,218 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:28:30,736 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-07-09 18:28:31,498 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-07-09 18:28:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:31,566 INFO L93 Difference]: Finished difference Result 2168 states and 6948 transitions. [2021-07-09 18:28:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:28:31,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:31,570 INFO L225 Difference]: With dead ends: 2168 [2021-07-09 18:28:31,570 INFO L226 Difference]: Without dead ends: 2143 [2021-07-09 18:28:31,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3092.6ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:28:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-07-09 18:28:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1584. [2021-07-09 18:28:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.360707517372078) internal successors, (5320), 1583 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5320 transitions. [2021-07-09 18:28:31,596 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5320 transitions. Word has length 26 [2021-07-09 18:28:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:31,597 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5320 transitions. [2021-07-09 18:28:31,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5320 transitions. [2021-07-09 18:28:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:31,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:31,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:31,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-07-09 18:28:31,817 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:31,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-07-09 18:28:31,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:31,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020153051] [2021-07-09 18:28:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:32,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:32,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020153051] [2021-07-09 18:28:32,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020153051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:32,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095530251] [2021-07-09 18:28:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:32,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:28:32,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:32,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:32,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:32,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,638 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:32,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:28:32,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,650 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:28:32,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:28:32,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,671 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:32,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:32,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,679 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:32,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:28:32,680 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:28:32,693 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,701 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:32,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:32,701 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,709 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:32,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:32,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:32,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:32,718 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:28:32,731 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:28:32,743 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,753 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:32,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:28:32,754 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:28:32,767 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,775 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:32,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:32,776 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,811 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:32,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:28:32,812 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:32,899 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-09 18:28:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:33,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095530251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:33,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:33,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:28:33,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498944815] [2021-07-09 18:28:33,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:28:33,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:28:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:28:33,108 INFO L87 Difference]: Start difference. First operand 1584 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:33,961 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-07-09 18:28:34,418 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-09 18:28:34,662 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 18:28:35,000 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-09 18:28:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:35,053 INFO L93 Difference]: Finished difference Result 2090 states and 6847 transitions. [2021-07-09 18:28:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:28:35,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:35,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:35,057 INFO L225 Difference]: With dead ends: 2090 [2021-07-09 18:28:35,057 INFO L226 Difference]: Without dead ends: 2061 [2021-07-09 18:28:35,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2235.3ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:28:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-07-09 18:28:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1587. [2021-07-09 18:28:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.3612862547288778) internal successors, (5331), 1586 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5331 transitions. [2021-07-09 18:28:35,078 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5331 transitions. Word has length 26 [2021-07-09 18:28:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:35,078 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5331 transitions. [2021-07-09 18:28:35,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5331 transitions. [2021-07-09 18:28:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:35,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:35,080 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:35,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:35,296 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:35,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-07-09 18:28:35,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:35,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019145145] [2021-07-09 18:28:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:35,503 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-07-09 18:28:35,646 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-07-09 18:28:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:35,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:35,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019145145] [2021-07-09 18:28:35,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019145145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:35,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588573634] [2021-07-09 18:28:35,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:28:35,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:35,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:35,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:36,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:36,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:36,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:36,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:36,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:36,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,360 INFO L628 ElimStorePlain]: treesize reduction 121, result has 46.0 percent of original size [2021-07-09 18:28:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:36,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:36,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:36,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:36,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:36,435 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-07-09 18:28:36,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:28:36,437 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-07-09 18:28:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:36,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588573634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:36,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:36,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:28:36,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856007941] [2021-07-09 18:28:36,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:28:36,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:28:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:28:36,490 INFO L87 Difference]: Start difference. First operand 1587 states and 5331 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:36,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:36,756 INFO L93 Difference]: Finished difference Result 1662 states and 5522 transitions. [2021-07-09 18:28:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:28:36,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:36,759 INFO L225 Difference]: With dead ends: 1662 [2021-07-09 18:28:36,759 INFO L226 Difference]: Without dead ends: 1647 [2021-07-09 18:28:36,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 846.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:28:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-09 18:28:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1593. [2021-07-09 18:28:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.363065326633166) internal successors, (5354), 1592 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5354 transitions. [2021-07-09 18:28:36,778 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5354 transitions. Word has length 26 [2021-07-09 18:28:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:36,778 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5354 transitions. [2021-07-09 18:28:36,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5354 transitions. [2021-07-09 18:28:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:36,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:36,780 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:36,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:36,996 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-07-09 18:28:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:36,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048838683] [2021-07-09 18:28:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:37,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:37,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048838683] [2021-07-09 18:28:37,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048838683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:37,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769476153] [2021-07-09 18:28:37,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:37,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:28:37,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:28:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:37,949 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_115, v_prenex_117], 3=[A, v_prenex_119]} [2021-07-09 18:28:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:37,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:28:37,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:37,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:37,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:28:37,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:38,120 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 18:28:38,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,134 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:38,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:28:38,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:38,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:28:38,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:38,275 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 18:28:38,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,289 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:28:38,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 18:28:38,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:28:38,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:38,418 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-09 18:28:38,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:28:38,436 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:38,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,447 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:28:38,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-09 18:28:38,448 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:38,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:38,554 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:194 [2021-07-09 18:28:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:38,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769476153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:38,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:38,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:28:38,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674667959] [2021-07-09 18:28:38,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:28:38,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:38,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:28:38,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:28:38,780 INFO L87 Difference]: Start difference. First operand 1593 states and 5354 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:39,951 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-07-09 18:28:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:40,013 INFO L93 Difference]: Finished difference Result 2262 states and 7355 transitions. [2021-07-09 18:28:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:28:40,013 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:40,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:40,017 INFO L225 Difference]: With dead ends: 2262 [2021-07-09 18:28:40,017 INFO L226 Difference]: Without dead ends: 2212 [2021-07-09 18:28:40,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1687.7ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:28:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-07-09 18:28:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1600. [2021-07-09 18:28:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.367104440275172) internal successors, (5384), 1599 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5384 transitions. [2021-07-09 18:28:40,040 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5384 transitions. Word has length 26 [2021-07-09 18:28:40,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:40,040 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5384 transitions. [2021-07-09 18:28:40,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5384 transitions. [2021-07-09 18:28:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:40,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:40,042 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:40,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-09 18:28:40,258 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:40,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-07-09 18:28:40,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:40,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538075213] [2021-07-09 18:28:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:40,455 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-07-09 18:28:40,674 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-09 18:28:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:40,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:40,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538075213] [2021-07-09 18:28:40,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538075213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:40,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23781123] [2021-07-09 18:28:40,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:40,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:28:40,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:28:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:41,244 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:28:41,435 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-09 18:28:41,497 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_129], 2=[A, v_prenex_128]} [2021-07-09 18:28:41,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:41,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:41,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:41,609 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:28:41,610 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:28:41,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:41,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:41,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:41,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:41,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:41,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:41,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:41,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:41,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:41,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:41,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:41,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:28:41,705 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:28:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:41,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23781123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:41,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:41,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:28:41,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41045197] [2021-07-09 18:28:41,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:28:41,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:41,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:28:41,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:28:41,761 INFO L87 Difference]: Start difference. First operand 1600 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:42,549 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:28:42,920 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-07-09 18:28:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:43,019 INFO L93 Difference]: Finished difference Result 1991 states and 6587 transitions. [2021-07-09 18:28:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:28:43,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:43,023 INFO L225 Difference]: With dead ends: 1991 [2021-07-09 18:28:43,023 INFO L226 Difference]: Without dead ends: 1976 [2021-07-09 18:28:43,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1986.3ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:28:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-07-09 18:28:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1611. [2021-07-09 18:28:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3670807453416147) internal successors, (5421), 1610 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5421 transitions. [2021-07-09 18:28:43,043 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5421 transitions. Word has length 26 [2021-07-09 18:28:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:43,044 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5421 transitions. [2021-07-09 18:28:43,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5421 transitions. [2021-07-09 18:28:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:43,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:43,046 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:43,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-07-09 18:28:43,262 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:43,262 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 25 times [2021-07-09 18:28:43,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:43,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029148302] [2021-07-09 18:28:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:43,461 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-09 18:28:43,606 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-07-09 18:28:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:43,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:43,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029148302] [2021-07-09 18:28:43,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029148302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:43,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505092377] [2021-07-09 18:28:43,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:43,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,083 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:44,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:28:44,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:44,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:28:44,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,112 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:44,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:28:44,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,124 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:44,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:28:44,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,134 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:44,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:28:44,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:44,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-09 18:28:44,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:28:44,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:44,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:28:44,178 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,190 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:44,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:28:44,191 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:44,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-09 18:28:44,207 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,218 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:44,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:28:44,218 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,229 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:44,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:28:44,230 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,242 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:44,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:28:44,244 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,254 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:44,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:28:44,254 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:44,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:28:44,267 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:44,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-09 18:28:44,277 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:44,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:44,352 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-09 18:28:44,483 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-09 18:28:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505092377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:44,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:44,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:28:44,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34010698] [2021-07-09 18:28:44,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:28:44,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:28:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:28:44,597 INFO L87 Difference]: Start difference. First operand 1611 states and 5421 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:45,254 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:28:45,439 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-07-09 18:28:45,880 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-09 18:28:46,041 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-07-09 18:28:46,238 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 18:28:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:46,339 INFO L93 Difference]: Finished difference Result 2102 states and 6930 transitions. [2021-07-09 18:28:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:28:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:46,343 INFO L225 Difference]: With dead ends: 2102 [2021-07-09 18:28:46,343 INFO L226 Difference]: Without dead ends: 2083 [2021-07-09 18:28:46,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2158.4ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:28:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-07-09 18:28:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1612. [2021-07-09 18:28:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3699565487274983) internal successors, (5429), 1611 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5429 transitions. [2021-07-09 18:28:46,365 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5429 transitions. Word has length 26 [2021-07-09 18:28:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:46,365 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5429 transitions. [2021-07-09 18:28:46,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5429 transitions. [2021-07-09 18:28:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:46,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:46,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:46,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:46,607 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 26 times [2021-07-09 18:28:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:46,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94040942] [2021-07-09 18:28:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:46,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:46,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94040942] [2021-07-09 18:28:46,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94040942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:46,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350176154] [2021-07-09 18:28:46,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:46,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:46,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:46,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:46,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:47,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,172 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:47,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:47,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:47,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:47,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:47,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:47,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:47,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:28:47,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:47,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:28:47,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,221 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:47,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:28:47,223 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,231 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:47,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:47,231 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:47,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:28:47,242 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,250 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:47,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:28:47,251 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:47,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:28:47,264 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,272 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:47,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:28:47,273 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:47,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:28:47,286 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,296 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:47,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:28:47,297 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:47,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:28:47,310 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,317 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:47,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:47,318 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:47,322 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:28:47,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:28:47,323 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:47,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:28:47,396 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:28:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:47,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350176154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:47,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:47,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:28:47,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459871078] [2021-07-09 18:28:47,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:28:47,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:28:47,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:28:47,610 INFO L87 Difference]: Start difference. First operand 1612 states and 5429 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:48,202 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:28:48,825 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-09 18:28:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:48,875 INFO L93 Difference]: Finished difference Result 2116 states and 6975 transitions. [2021-07-09 18:28:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:28:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:48,878 INFO L225 Difference]: With dead ends: 2116 [2021-07-09 18:28:48,878 INFO L226 Difference]: Without dead ends: 2091 [2021-07-09 18:28:48,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1544.9ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:28:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-07-09 18:28:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1618. [2021-07-09 18:28:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.368583797155226) internal successors, (5447), 1617 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5447 transitions. [2021-07-09 18:28:48,916 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5447 transitions. Word has length 26 [2021-07-09 18:28:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:48,916 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5447 transitions. [2021-07-09 18:28:48,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5447 transitions. [2021-07-09 18:28:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:48,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:48,919 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:49,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-07-09 18:28:49,135 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:49,135 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-07-09 18:28:49,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:49,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347962191] [2021-07-09 18:28:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:49,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347962191] [2021-07-09 18:28:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347962191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112529738] [2021-07-09 18:28:49,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:49,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:28:49,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:49,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:50,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:28:50,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:28:50,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:28:50,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:28:50,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:28:50,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:28:50,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-09 18:28:50,278 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:28:50,286 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:28:50,294 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-09 18:28:50,302 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:28:50,311 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:28:50,318 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-09 18:28:50,325 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:28:50,333 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:28:50,340 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:50,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:50,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:28:50,344 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:50,374 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-07-09 18:28:50,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:50,375 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-09 18:28:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:50,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112529738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:50,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:50,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:28:50,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357416892] [2021-07-09 18:28:50,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:28:50,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:50,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:28:50,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:28:50,404 INFO L87 Difference]: Start difference. First operand 1618 states and 5447 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:51,995 INFO L93 Difference]: Finished difference Result 2097 states and 6880 transitions. [2021-07-09 18:28:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:28:51,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:51,999 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 18:28:51,999 INFO L226 Difference]: Without dead ends: 2071 [2021-07-09 18:28:51,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1886.8ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:28:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-07-09 18:28:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1622. [2021-07-09 18:28:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-07-09 18:28:52,022 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-07-09 18:28:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:52,022 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-07-09 18:28:52,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-07-09 18:28:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:52,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:52,024 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:52,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-07-09 18:28:52,241 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:52,241 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-07-09 18:28:52,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:52,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616609357] [2021-07-09 18:28:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:52,851 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-07-09 18:28:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:52,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:52,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616609357] [2021-07-09 18:28:52,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616609357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:52,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212521558] [2021-07-09 18:28:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:52,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:53,258 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-09 18:28:53,306 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_132, v_prenex_134], 6=[A, v_prenex_130]} [2021-07-09 18:28:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:53,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:28:53,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:53,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:53,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:53,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:28:53,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:53,432 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-09 18:28:53,432 INFO L628 ElimStorePlain]: treesize reduction 180, result has 40.2 percent of original size [2021-07-09 18:28:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:53,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:28:53,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:53,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:53,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:53,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:53,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:53,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:53,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:28:53,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:53,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:53,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:53,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:28:53,541 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:53,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:53,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:28:53,567 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:43 [2021-07-09 18:28:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:53,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212521558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:53,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:53,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:28:53,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410991623] [2021-07-09 18:28:53,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:28:53,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:28:53,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:28:53,609 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:55,244 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-09 18:28:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:55,372 INFO L93 Difference]: Finished difference Result 2270 states and 7447 transitions. [2021-07-09 18:28:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:28:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:28:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:55,376 INFO L225 Difference]: With dead ends: 2270 [2021-07-09 18:28:55,376 INFO L226 Difference]: Without dead ends: 2255 [2021-07-09 18:28:55,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2244.5ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:28:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-07-09 18:28:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1622. [2021-07-09 18:28:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-07-09 18:28:55,400 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-07-09 18:28:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:55,400 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-07-09 18:28:55,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-07-09 18:28:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:28:55,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:55,402 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:55,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:55,615 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:55,616 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 27 times [2021-07-09 18:28:55,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:55,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725890658] [2021-07-09 18:28:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:55,848 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-07-09 18:28:56,070 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-07-09 18:28:56,184 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-09 18:28:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:56,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725890658] [2021-07-09 18:28:56,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725890658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865758860] [2021-07-09 18:28:56,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:56,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:28:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:56,581 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-09 18:28:57,029 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-07-09 18:28:57,112 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_143, v_prenex_145], 6=[A, v_prenex_147]} [2021-07-09 18:28:57,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:57,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:57,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:28:57,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:57,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:57,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:57,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:57,275 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-09 18:28:57,275 INFO L628 ElimStorePlain]: treesize reduction 147, result has 51.5 percent of original size [2021-07-09 18:28:57,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:57,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:57,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:28:57,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:57,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:57,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:57,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:57,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:57,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:57,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:57,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:28:57,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:57,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:57,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:57,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:28:57,384 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:57,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:57,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:28:57,441 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:341, output treesize:61 [2021-07-09 18:28:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:57,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865758860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:57,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:57,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:28:57,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378607491] [2021-07-09 18:28:57,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:28:57,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:57,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:28:57,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:28:57,499 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:57,916 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-09 18:28:58,218 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-09 18:28:58,365 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-07-09 18:28:58,817 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2021-07-09 18:28:59,431 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-07-09 18:28:59,925 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-07-09 18:29:00,576 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 87 [2021-07-09 18:29:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:00,681 INFO L93 Difference]: Finished difference Result 2122 states and 6912 transitions. [2021-07-09 18:29:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:29:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:29:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:00,684 INFO L225 Difference]: With dead ends: 2122 [2021-07-09 18:29:00,684 INFO L226 Difference]: Without dead ends: 2107 [2021-07-09 18:29:00,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3894.4ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:29:00,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-07-09 18:29:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1633. [2021-07-09 18:29:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3670343137254903) internal successors, (5495), 1632 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5495 transitions. [2021-07-09 18:29:00,707 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5495 transitions. Word has length 26 [2021-07-09 18:29:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:00,707 INFO L482 AbstractCegarLoop]: Abstraction has 1633 states and 5495 transitions. [2021-07-09 18:29:00,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5495 transitions. [2021-07-09 18:29:00,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:29:00,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:00,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:00,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-07-09 18:29:00,925 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-07-09 18:29:00,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:00,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934382757] [2021-07-09 18:29:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:01,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:01,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934382757] [2021-07-09 18:29:01,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934382757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:01,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002591449] [2021-07-09 18:29:01,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:01,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:01,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:29:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:01,849 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-07-09 18:29:02,173 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_158], 6=[v_prenex_160, v_prenex_162]} [2021-07-09 18:29:02,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,207 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:29:02,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-09 18:29:02,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,231 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:29:02,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:29:02,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,495 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-09 18:29:02,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,525 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:29:02,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-09 18:29:02,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-09 18:29:02,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,714 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 18:29:02,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:02,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:02,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-09 18:29:02,740 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:02,757 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:29:02,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:29:02,758 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,896 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-09 18:29:02,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:02,920 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:29:02,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:29:02,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:02,938 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:29:02,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:29:02,940 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:03,061 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-09 18:29:03,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:03,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:29:03,094 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:433, output treesize:343 [2021-07-09 18:29:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:03,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002591449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:03,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:03,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:29:03,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032699173] [2021-07-09 18:29:03,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:29:03,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:03,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:29:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:29:03,244 INFO L87 Difference]: Start difference. First operand 1633 states and 5495 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:05,201 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-09 18:29:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:05,804 INFO L93 Difference]: Finished difference Result 2550 states and 8113 transitions. [2021-07-09 18:29:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:29:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:29:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:05,809 INFO L225 Difference]: With dead ends: 2550 [2021-07-09 18:29:05,809 INFO L226 Difference]: Without dead ends: 2506 [2021-07-09 18:29:05,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 2962.2ms TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:29:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-07-09 18:29:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1640. [2021-07-09 18:29:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.36790726052471) internal successors, (5520), 1639 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5520 transitions. [2021-07-09 18:29:05,835 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5520 transitions. Word has length 26 [2021-07-09 18:29:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:05,835 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5520 transitions. [2021-07-09 18:29:05,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5520 transitions. [2021-07-09 18:29:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:29:05,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:05,838 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:06,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:06,053 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:06,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-07-09 18:29:06,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:06,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134970392] [2021-07-09 18:29:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:06,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134970392] [2021-07-09 18:29:06,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134970392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483800046] [2021-07-09 18:29:06,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:06,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:29:06,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:06,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:29:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:06,866 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:29:07,072 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 18:29:07,381 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:29:07,754 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:29:07,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-07-09 18:29:07,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:07,812 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-07-09 18:29:07,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 38 [2021-07-09 18:29:07,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:08,939 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 175 DAG size of output: 169 [2021-07-09 18:29:08,940 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.5 percent of original size [2021-07-09 18:29:09,011 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-09 18:29:09,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-07-09 18:29:09,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:09,068 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-09 18:29:09,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-07-09 18:29:09,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:09,612 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-09 18:29:09,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:09,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:09,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-07-09 18:29:09,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:09,747 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-07-09 18:29:09,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:29:09,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:11,425 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2021-07-09 18:29:11,426 INFO L628 ElimStorePlain]: treesize reduction 92, result has 90.6 percent of original size [2021-07-09 18:29:11,498 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:29:11,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2021-07-09 18:29:11,509 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:11,577 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-07-09 18:29:11,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-07-09 18:29:11,591 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:12,643 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 181 DAG size of output: 172 [2021-07-09 18:29:12,643 INFO L628 ElimStorePlain]: treesize reduction 83, result has 91.5 percent of original size [2021-07-09 18:29:12,702 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-09 18:29:12,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-07-09 18:29:12,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:12,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:12,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-07-09 18:29:12,778 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:13,278 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-07-09 18:29:13,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:13,345 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:29:13,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-07-09 18:29:13,354 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:13,413 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:29:13,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-07-09 18:29:13,433 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:14,449 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2021-07-09 18:29:14,450 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.8 percent of original size [2021-07-09 18:29:14,511 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-09 18:29:14,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-07-09 18:29:14,520 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:14,573 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-09 18:29:14,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-07-09 18:29:14,576 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:15,053 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-09 18:29:15,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:15,106 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-09 18:29:15,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-07-09 18:29:15,109 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:15,165 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:29:15,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-07-09 18:29:15,184 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:16,068 WARN L205 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-07-09 18:29:16,068 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-07-09 18:29:16,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-09 18:29:16,173 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2294 [2021-07-09 18:29:16,857 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 69 [2021-07-09 18:29:17,014 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-09 18:29:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:17,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483800046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:17,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:17,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:29:17,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148744370] [2021-07-09 18:29:17,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:29:17,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:17,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:29:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:29:17,040 INFO L87 Difference]: Start difference. First operand 1640 states and 5520 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:19,551 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-09 18:29:19,949 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 18:29:20,672 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-07-09 18:29:21,074 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-07-09 18:29:21,459 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-09 18:29:21,633 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 33 [2021-07-09 18:29:22,251 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 90 [2021-07-09 18:29:22,743 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 92 [2021-07-09 18:29:23,614 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 96 [2021-07-09 18:29:24,029 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-07-09 18:29:24,251 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-07-09 18:29:24,390 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2021-07-09 18:29:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:24,514 INFO L93 Difference]: Finished difference Result 3086 states and 9767 transitions. [2021-07-09 18:29:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:29:24,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:29:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:24,524 INFO L225 Difference]: With dead ends: 3086 [2021-07-09 18:29:24,524 INFO L226 Difference]: Without dead ends: 3056 [2021-07-09 18:29:24,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 7950.0ms TimeCoverageRelationStatistics Valid=696, Invalid=4134, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:29:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-07-09 18:29:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1671. [2021-07-09 18:29:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3748502994011975) internal successors, (5636), 1670 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5636 transitions. [2021-07-09 18:29:24,585 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5636 transitions. Word has length 26 [2021-07-09 18:29:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:24,585 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5636 transitions. [2021-07-09 18:29:24,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5636 transitions. [2021-07-09 18:29:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:29:24,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:24,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:24,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:24,805 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 28 times [2021-07-09 18:29:24,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:24,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107646157] [2021-07-09 18:29:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:25,088 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-09 18:29:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:25,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:25,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107646157] [2021-07-09 18:29:25,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107646157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:25,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713977319] [2021-07-09 18:29:25,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:25,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:29:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:29:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:25,850 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:29:26,114 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-09 18:29:26,177 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_185], 2=[v_prenex_186, v_prenex_187], 3=[A]} [2021-07-09 18:29:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:26,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:29:26,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:26,293 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:29:26,293 INFO L628 ElimStorePlain]: treesize reduction 94, result has 60.3 percent of original size [2021-07-09 18:29:26,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:26,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:26,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:26,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:29:26,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:26,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:26,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:26,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:29:26,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:26,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:26,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:26,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:26,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:29:26,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:26,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:26,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:29:26,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:26,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:26,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:29:26,423 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:251, output treesize:56 [2021-07-09 18:29:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:26,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713977319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:26,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:26,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:29:26,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679670840] [2021-07-09 18:29:26,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:29:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:29:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:29:26,474 INFO L87 Difference]: Start difference. First operand 1671 states and 5636 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:27,027 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-09 18:29:27,811 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:29:27,963 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 18:29:28,179 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-07-09 18:29:28,414 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-07-09 18:29:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:28,534 INFO L93 Difference]: Finished difference Result 2244 states and 7296 transitions. [2021-07-09 18:29:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:29:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:29:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:28,538 INFO L225 Difference]: With dead ends: 2244 [2021-07-09 18:29:28,538 INFO L226 Difference]: Without dead ends: 2229 [2021-07-09 18:29:28,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2770.4ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:29:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-07-09 18:29:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1676. [2021-07-09 18:29:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3761194029850747) internal successors, (5655), 1675 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5655 transitions. [2021-07-09 18:29:28,562 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5655 transitions. Word has length 26 [2021-07-09 18:29:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:28,562 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5655 transitions. [2021-07-09 18:29:28,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5655 transitions. [2021-07-09 18:29:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:29:28,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:28,564 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:28,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:28,780 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 318878074, now seen corresponding path program 29 times [2021-07-09 18:29:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:28,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990338210] [2021-07-09 18:29:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:29,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:29,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990338210] [2021-07-09 18:29:29,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990338210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:29,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806726379] [2021-07-09 18:29:29,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:29,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:29:29,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:29,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:29:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:29,567 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 18:29:29,772 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-09 18:29:29,821 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_195, v_prenex_197, v_prenex_199, v_prenex_200, v_prenex_201], 3=[v_prenex_196, v_prenex_198]} [2021-07-09 18:29:29,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:29,835 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:29:29,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:29:29,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:29,977 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:29:29,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:29,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:29,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:29,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:29:29,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:30,113 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:29:30,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:30,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:29:30,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:30,246 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:29:30,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:30,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:29:30,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:30,374 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-09 18:29:30,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:30,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:29:30,387 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:30,491 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 18:29:30,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:30,502 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:29:30,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:29:30,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:30,604 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 18:29:30,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:30,616 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:29:30,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:29:30,618 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:30,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:30,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:29:30,728 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:30,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:30,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:29:30,825 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-07-09 18:29:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:31,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806726379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:31,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:31,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:29:31,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147675350] [2021-07-09 18:29:31,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:29:31,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:29:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:29:31,014 INFO L87 Difference]: Start difference. First operand 1676 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:31,350 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-09 18:29:32,407 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-09 18:29:32,919 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2021-07-09 18:29:33,337 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-07-09 18:29:33,777 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-07-09 18:29:34,276 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 110 [2021-07-09 18:29:34,771 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-07-09 18:29:35,033 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-09 18:29:35,352 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-09 18:29:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:35,506 INFO L93 Difference]: Finished difference Result 2686 states and 8637 transitions. [2021-07-09 18:29:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:29:35,506 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:29:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:35,511 INFO L225 Difference]: With dead ends: 2686 [2021-07-09 18:29:35,512 INFO L226 Difference]: Without dead ends: 2652 [2021-07-09 18:29:35,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 4646.5ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:29:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-07-09 18:29:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1683. [2021-07-09 18:29:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.381688466111772) internal successors, (5688), 1682 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5688 transitions. [2021-07-09 18:29:35,543 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5688 transitions. Word has length 26 [2021-07-09 18:29:35,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:35,543 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5688 transitions. [2021-07-09 18:29:35,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5688 transitions. [2021-07-09 18:29:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:29:35,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:35,546 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:35,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-07-09 18:29:35,762 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-07-09 18:29:35,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:35,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401306248] [2021-07-09 18:29:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:36,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:36,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401306248] [2021-07-09 18:29:36,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401306248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:36,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112419121] [2021-07-09 18:29:36,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:36,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:29:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:29:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:29:36,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:29:36,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:29:36,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:29:36,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:29:36,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:29:36,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:29:36,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:29:36,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:29:36,809 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:29:36,817 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:29:36,826 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:29:36,834 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-09 18:29:36,842 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:29:36,850 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:29:36,858 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:36,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:36,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:29:36,864 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,916 INFO L628 ElimStorePlain]: treesize reduction 216, result has 14.6 percent of original size [2021-07-09 18:29:36,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:36,918 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-07-09 18:29:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112419121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:36,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:36,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:29:36,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840973826] [2021-07-09 18:29:36,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:29:36,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:36,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:29:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:29:36,955 INFO L87 Difference]: Start difference. First operand 1683 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,649 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-07-09 18:29:37,772 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-07-09 18:29:38,361 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-07-09 18:29:38,997 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 18:29:39,118 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-09 18:29:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:39,698 INFO L93 Difference]: Finished difference Result 3384 states and 10825 transitions. [2021-07-09 18:29:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:29:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:29:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:39,704 INFO L225 Difference]: With dead ends: 3384 [2021-07-09 18:29:39,704 INFO L226 Difference]: Without dead ends: 3348 [2021-07-09 18:29:39,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2751.8ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:29:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-07-09 18:29:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 1796. [2021-07-09 18:29:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.403899721448468) internal successors, (6110), 1795 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6110 transitions. [2021-07-09 18:29:39,737 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6110 transitions. Word has length 26 [2021-07-09 18:29:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:39,737 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 6110 transitions. [2021-07-09 18:29:39,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6110 transitions. [2021-07-09 18:29:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:29:39,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:39,740 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:39,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:39,948 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-07-09 18:29:39,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:39,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430710659] [2021-07-09 18:29:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:40,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430710659] [2021-07-09 18:29:40,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430710659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41397242] [2021-07-09 18:29:40,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:40,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:29:40,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:29:40,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:40,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,827 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:29:40,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 37 [2021-07-09 18:29:40,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,863 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-09 18:29:40,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-07-09 18:29:40,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:40,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,895 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:29:40,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-09 18:29:40,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,923 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:29:40,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-09 18:29:40,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:40,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,952 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:29:40,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:29:40,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:40,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,971 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:29:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:29:40,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:40,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:40,998 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:29:40,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-07-09 18:29:40,999 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,017 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:29:41,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:29:41,018 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,035 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:29:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:29:41,036 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,053 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:29:41,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:29:41,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,079 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:29:41,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-09 18:29:41,080 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,096 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:29:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-07-09 18:29:41,097 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,113 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:29:41,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:29:41,114 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,130 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:29:41,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:29:41,130 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:41,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-09 18:29:41,160 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:41,170 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:29:41,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:29:41,170 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:41,341 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-07-09 18:29:41,341 INFO L628 ElimStorePlain]: treesize reduction 116, result has 51.7 percent of original size [2021-07-09 18:29:41,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:29:41,343 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-09 18:29:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:41,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41397242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:41,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:41,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:29:41,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845736198] [2021-07-09 18:29:41,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:29:41,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:29:41,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:29:41,481 INFO L87 Difference]: Start difference. First operand 1796 states and 6110 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:42,758 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-07-09 18:29:43,273 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-09 18:29:43,520 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-09 18:29:43,751 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-09 18:29:44,294 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-07-09 18:29:44,558 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-09 18:29:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:44,827 INFO L93 Difference]: Finished difference Result 3832 states and 12118 transitions. [2021-07-09 18:29:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:29:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:29:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:44,834 INFO L225 Difference]: With dead ends: 3832 [2021-07-09 18:29:44,834 INFO L226 Difference]: Without dead ends: 3775 [2021-07-09 18:29:44,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3272.1ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:29:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-07-09 18:29:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1819. [2021-07-09 18:29:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.407590759075908) internal successors, (6195), 1818 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6195 transitions. [2021-07-09 18:29:44,869 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6195 transitions. Word has length 26 [2021-07-09 18:29:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:44,869 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 6195 transitions. [2021-07-09 18:29:44,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6195 transitions. [2021-07-09 18:29:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:29:44,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:44,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:45,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-07-09 18:29:45,085 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 30 times [2021-07-09 18:29:45,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:45,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499968935] [2021-07-09 18:29:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:45,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:45,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499968935] [2021-07-09 18:29:45,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499968935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:45,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922847286] [2021-07-09 18:29:45,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:45,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:29:45,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:29:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:46,060 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 18:29:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:46,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:46,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:29:46,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:46,695 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-09 18:29:46,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:46,717 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:29:46,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:29:46,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:46,863 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-09 18:29:46,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:46,888 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:29:46,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:29:46,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:47,034 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-09 18:29:47,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:47,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:47,058 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:29:47,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:29:47,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:47,190 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 18:29:47,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:47,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:47,213 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:29:47,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:29:47,214 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:47,344 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 18:29:47,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:47,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:47,363 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:29:47,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:29:47,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:47,516 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:29:47,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:47,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:47,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:47,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:29:47,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:47,667 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-09 18:29:47,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:47,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:47,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:29:47,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:47,826 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:29:47,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:47,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:29:47,848 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:373, output treesize:497 [2021-07-09 18:29:48,170 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-09 18:29:48,430 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-09 18:29:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:48,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922847286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:48,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:48,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:29:48,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508832720] [2021-07-09 18:29:48,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:29:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:29:48,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:29:48,554 INFO L87 Difference]: Start difference. First operand 1819 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:48,811 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-07-09 18:29:49,035 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:29:49,659 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 18:29:49,853 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-07-09 18:29:50,206 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-07-09 18:29:50,547 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-09 18:29:51,154 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-07-09 18:29:51,680 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-07-09 18:29:52,093 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-07-09 18:29:52,386 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-07-09 18:29:52,967 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-07-09 18:29:53,200 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-09 18:29:53,458 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-09 18:29:54,002 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-07-09 18:29:54,693 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-07-09 18:29:55,193 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-07-09 18:29:56,156 WARN L205 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-07-09 18:29:56,590 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-07-09 18:29:57,039 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-07-09 18:29:57,473 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-07-09 18:29:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:57,546 INFO L93 Difference]: Finished difference Result 2671 states and 8693 transitions. [2021-07-09 18:29:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:29:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:29:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:57,552 INFO L225 Difference]: With dead ends: 2671 [2021-07-09 18:29:57,552 INFO L226 Difference]: Without dead ends: 2637 [2021-07-09 18:29:57,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 9361.5ms TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:29:57,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-07-09 18:29:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1837. [2021-07-09 18:29:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.411764705882353) internal successors, (6264), 1836 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6264 transitions. [2021-07-09 18:29:57,587 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6264 transitions. Word has length 26 [2021-07-09 18:29:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:57,587 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6264 transitions. [2021-07-09 18:29:57,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6264 transitions. [2021-07-09 18:29:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:29:57,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:57,591 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:57,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-07-09 18:29:57,805 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash 461518918, now seen corresponding path program 31 times [2021-07-09 18:29:57,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:57,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164010674] [2021-07-09 18:29:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:58,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:58,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164010674] [2021-07-09 18:29:58,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164010674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:58,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546504019] [2021-07-09 18:29:58,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:58,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:29:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:58,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,470 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:29:58,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:29:58,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:29:58,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-09 18:29:58,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,510 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:29:58,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:29:58,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,525 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:29:58,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:29:58,526 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,536 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:29:58,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:29:58,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,547 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:29:58,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:29:58,548 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,559 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:29:58,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-07-09 18:29:58,560 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,569 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:29:58,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-09 18:29:58,570 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,581 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:29:58,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:29:58,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,592 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:29:58,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:29:58,593 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:29:58,608 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:29:58,622 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-09 18:29:58,637 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,648 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:29:58,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-09 18:29:58,650 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,657 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:29:58,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:29:58,657 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:29:58,739 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-07-09 18:29:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:58,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546504019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:58,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:58,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:29:58,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684232336] [2021-07-09 18:29:58,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:29:58,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:58,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:29:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:29:58,969 INFO L87 Difference]: Start difference. First operand 1837 states and 6264 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:59,820 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-09 18:30:00,735 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-09 18:30:01,110 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:30:01,301 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-07-09 18:30:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:01,489 INFO L93 Difference]: Finished difference Result 2618 states and 8665 transitions. [2021-07-09 18:30:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:30:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:30:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:01,494 INFO L225 Difference]: With dead ends: 2618 [2021-07-09 18:30:01,495 INFO L226 Difference]: Without dead ends: 2584 [2021-07-09 18:30:01,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2543.3ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:30:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-07-09 18:30:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1832. [2021-07-09 18:30:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.409612233752048) internal successors, (6243), 1831 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6243 transitions. [2021-07-09 18:30:01,528 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6243 transitions. Word has length 26 [2021-07-09 18:30:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:01,528 INFO L482 AbstractCegarLoop]: Abstraction has 1832 states and 6243 transitions. [2021-07-09 18:30:01,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6243 transitions. [2021-07-09 18:30:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:30:01,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:01,531 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:01,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:01,748 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 32 times [2021-07-09 18:30:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:01,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875516145] [2021-07-09 18:30:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:01,970 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:30:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:02,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:02,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875516145] [2021-07-09 18:30:02,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875516145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:02,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408830838] [2021-07-09 18:30:02,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:02,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:30:02,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:02,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:30:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:02,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:02,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:30:02,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:02,726 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:30:02,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:30:02,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:02,877 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:30:02,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:02,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:02,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:30:02,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:02,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:02,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:30:02,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:03,062 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:30:03,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:03,082 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:30:03,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:30:03,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:03,103 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:30:03,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:30:03,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:03,245 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:30:03,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:03,266 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:30:03,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:30:03,268 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:03,283 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:30:03,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:30:03,285 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:03,416 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 18:30:03,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:03,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:30:03,481 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:430 [2021-07-09 18:30:03,674 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-09 18:30:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:03,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408830838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:03,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:03,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:30:03,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095806703] [2021-07-09 18:30:03,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:30:03,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:03,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:30:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:30:03,905 INFO L87 Difference]: Start difference. First operand 1832 states and 6243 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:04,067 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 27 [2021-07-09 18:30:04,570 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-09 18:30:04,719 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-07-09 18:30:04,945 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-09 18:30:05,537 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-09 18:30:05,922 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-09 18:30:06,233 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-07-09 18:30:06,616 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-09 18:30:07,012 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-07-09 18:30:07,311 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:30:07,589 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-07-09 18:30:07,916 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-07-09 18:30:08,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:08,287 INFO L93 Difference]: Finished difference Result 2647 states and 8625 transitions. [2021-07-09 18:30:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:30:08,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:30:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:08,291 INFO L225 Difference]: With dead ends: 2647 [2021-07-09 18:30:08,292 INFO L226 Difference]: Without dead ends: 2578 [2021-07-09 18:30:08,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4529.9ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:30:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-07-09 18:30:08,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1826. [2021-07-09 18:30:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.4076712328767123) internal successors, (6219), 1825 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6219 transitions. [2021-07-09 18:30:08,319 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6219 transitions. Word has length 26 [2021-07-09 18:30:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:08,319 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6219 transitions. [2021-07-09 18:30:08,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6219 transitions. [2021-07-09 18:30:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:30:08,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:08,322 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:08,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:08,537 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-07-09 18:30:08,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:08,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143347530] [2021-07-09 18:30:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:09,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:09,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143347530] [2021-07-09 18:30:09,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143347530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:09,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769984911] [2021-07-09 18:30:09,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:09,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:30:09,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:30:09,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:30:09,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:30:09,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:30:09,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:30:09,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:30:09,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:30:09,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:30:09,622 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:30:09,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:30:09,639 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-07-09 18:30:09,652 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:30:09,660 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:30:09,668 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:30:09,677 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:30:09,684 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:30:09,692 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:09,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:09,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:30:09,696 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:09,728 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-07-09 18:30:09,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:09,729 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:21 [2021-07-09 18:30:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:09,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769984911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:09,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:09,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:30:09,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118665468] [2021-07-09 18:30:09,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:30:09,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:09,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:30:09,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:30:09,762 INFO L87 Difference]: Start difference. First operand 1826 states and 6219 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:10,338 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-07-09 18:30:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:11,468 INFO L93 Difference]: Finished difference Result 2336 states and 7723 transitions. [2021-07-09 18:30:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:30:11,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:30:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:11,473 INFO L225 Difference]: With dead ends: 2336 [2021-07-09 18:30:11,473 INFO L226 Difference]: Without dead ends: 2314 [2021-07-09 18:30:11,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1969.9ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:30:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-07-09 18:30:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1818. [2021-07-09 18:30:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-07-09 18:30:11,505 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-07-09 18:30:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:11,505 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-07-09 18:30:11,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-07-09 18:30:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:30:11,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:11,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:11,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-07-09 18:30:11,721 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:11,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-07-09 18:30:11,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:11,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091611717] [2021-07-09 18:30:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:11,954 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-07-09 18:30:12,110 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-07-09 18:30:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:12,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:12,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091611717] [2021-07-09 18:30:12,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091611717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:12,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553004792] [2021-07-09 18:30:12,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:12,862 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-09 18:30:12,940 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_263, v_prenex_259], 5=[A, v_prenex_261]} [2021-07-09 18:30:12,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:12,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:12,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:30:12,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,025 INFO L628 ElimStorePlain]: treesize reduction 150, result has 45.5 percent of original size [2021-07-09 18:30:13,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:13,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:13,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:13,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:30:13,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:13,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:30:13,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:13,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:13,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:30:13,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:30:13,119 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:41 [2021-07-09 18:30:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:13,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553004792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:13,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:13,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:30:13,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638752529] [2021-07-09 18:30:13,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:30:13,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:13,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:30:13,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:30:13,165 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:15,309 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-07-09 18:30:15,847 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 18:30:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:16,007 INFO L93 Difference]: Finished difference Result 2526 states and 8350 transitions. [2021-07-09 18:30:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:30:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:30:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:16,012 INFO L225 Difference]: With dead ends: 2526 [2021-07-09 18:30:16,013 INFO L226 Difference]: Without dead ends: 2511 [2021-07-09 18:30:16,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3157.9ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:30:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-07-09 18:30:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1818. [2021-07-09 18:30:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-07-09 18:30:16,047 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-07-09 18:30:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:16,047 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-07-09 18:30:16,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-07-09 18:30:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:30:16,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:16,050 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:16,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:16,265 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-07-09 18:30:16,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:16,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402208557] [2021-07-09 18:30:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:16,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:16,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402208557] [2021-07-09 18:30:16,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402208557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:16,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380087648] [2021-07-09 18:30:16,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:30:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:17,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,025 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:30:17,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:30:17,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,057 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-09 18:30:17,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-07-09 18:30:17,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,120 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-09 18:30:17,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:30:17,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,149 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:30:17,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:30:17,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,169 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:30:17,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:30:17,170 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,197 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-09 18:30:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-07-09 18:30:17,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,228 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-09 18:30:17,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-09 18:30:17,232 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,250 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:30:17,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:30:17,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,270 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:30:17,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:30:17,271 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,297 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-09 18:30:17,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-07-09 18:30:17,299 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 18:30:17,333 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,352 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:30:17,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:30:17,353 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,371 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:30:17,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:30:17,372 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,389 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:30:17,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:30:17,390 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,407 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:30:17,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:30:17,408 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:17,418 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:30:17,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:30:17,419 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:17,515 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-07-09 18:30:17,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:30:17,516 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-07-09 18:30:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:17,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380087648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:17,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:17,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-07-09 18:30:17,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285724837] [2021-07-09 18:30:17,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:30:17,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:30:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:30:17,617 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:19,530 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-09 18:30:20,194 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-09 18:30:20,577 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-07-09 18:30:21,031 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-09 18:30:21,399 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-07-09 18:30:21,534 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-09 18:30:21,815 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-09 18:30:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:22,212 INFO L93 Difference]: Finished difference Result 3017 states and 9720 transitions. [2021-07-09 18:30:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:30:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:30:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:22,218 INFO L225 Difference]: With dead ends: 3017 [2021-07-09 18:30:22,218 INFO L226 Difference]: Without dead ends: 2970 [2021-07-09 18:30:22,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 4164.8ms TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:30:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-07-09 18:30:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1841. [2021-07-09 18:30:22,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3967391304347827) internal successors, (6250), 1840 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6250 transitions. [2021-07-09 18:30:22,257 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6250 transitions. Word has length 26 [2021-07-09 18:30:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:22,258 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6250 transitions. [2021-07-09 18:30:22,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6250 transitions. [2021-07-09 18:30:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:30:22,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:22,261 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:22,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-07-09 18:30:22,478 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:22,478 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-07-09 18:30:22,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:22,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506888168] [2021-07-09 18:30:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:22,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:22,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506888168] [2021-07-09 18:30:22,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506888168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:22,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620720851] [2021-07-09 18:30:22,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:22,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:30:22,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:30:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:23,332 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-09 18:30:23,549 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_273, v_prenex_265, v_prenex_277, v_prenex_267, v_prenex_269], 6=[v_prenex_271, v_prenex_275]} [2021-07-09 18:30:23,617 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:30:23,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-07-09 18:30:23,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:23,680 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-07-09 18:30:23,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-07-09 18:30:23,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:24,738 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2021-07-09 18:30:24,738 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.5 percent of original size [2021-07-09 18:30:24,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:24,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-07-09 18:30:24,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:24,855 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:30:24,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:30:24,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:26,383 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-07-09 18:30:26,384 INFO L628 ElimStorePlain]: treesize reduction 45, result has 95.3 percent of original size [2021-07-09 18:30:26,451 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:30:26,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-09 18:30:26,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:26,520 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:30:26,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-09 18:30:26,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:27,606 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 182 DAG size of output: 176 [2021-07-09 18:30:27,607 INFO L628 ElimStorePlain]: treesize reduction 44, result has 95.4 percent of original size [2021-07-09 18:30:27,673 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:30:27,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-07-09 18:30:27,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:27,731 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:30:27,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-07-09 18:30:27,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:28,792 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 177 DAG size of output: 167 [2021-07-09 18:30:28,793 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.0 percent of original size [2021-07-09 18:30:28,847 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:30:28,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-07-09 18:30:28,851 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:28,894 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:30:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:30:28,899 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:29,401 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:30:29,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:29,448 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-07-09 18:30:29,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-07-09 18:30:29,450 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:29,498 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:30:29,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-07-09 18:30:29,501 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,002 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 18:30:30,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:30,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:30,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:30,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-09 18:30:30,058 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:30,105 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:30:30,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-09 18:30:30,113 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,607 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-09 18:30:30,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:30,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:30,659 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:30:30,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-09 18:30:30,671 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:30,689 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:30:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:30:30,689 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:31,114 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-09 18:30:31,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:31,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-09 18:30:31,159 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:957, output treesize:1656 [2021-07-09 18:30:31,733 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-07-09 18:30:32,035 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:30:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:32,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620720851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:32,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:32,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:30:32,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911260615] [2021-07-09 18:30:32,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:30:32,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:30:32,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:30:32,209 INFO L87 Difference]: Start difference. First operand 1841 states and 6250 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:32,574 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-09 18:30:32,957 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2021-07-09 18:30:33,172 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-09 18:30:33,556 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-07-09 18:30:34,076 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-09 18:30:34,612 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-07-09 18:30:34,779 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-07-09 18:30:35,344 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2021-07-09 18:30:35,848 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-07-09 18:30:36,250 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-07-09 18:30:36,438 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-07-09 18:30:36,763 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2021-07-09 18:30:37,387 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 76 [2021-07-09 18:30:37,680 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-07-09 18:30:37,933 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2021-07-09 18:30:38,770 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-07-09 18:30:39,760 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 77 [2021-07-09 18:30:40,108 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-07-09 18:30:40,620 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-07-09 18:30:40,857 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2021-07-09 18:30:41,073 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2021-07-09 18:30:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:41,212 INFO L93 Difference]: Finished difference Result 3177 states and 10241 transitions. [2021-07-09 18:30:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:30:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:30:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:41,219 INFO L225 Difference]: With dead ends: 3177 [2021-07-09 18:30:41,219 INFO L226 Difference]: Without dead ends: 3132 [2021-07-09 18:30:41,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 9518.1ms TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:30:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-07-09 18:30:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1888. [2021-07-09 18:30:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.3995760466348703) internal successors, (6415), 1887 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6415 transitions. [2021-07-09 18:30:41,259 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6415 transitions. Word has length 26 [2021-07-09 18:30:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:41,259 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6415 transitions. [2021-07-09 18:30:41,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6415 transitions. [2021-07-09 18:30:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:30:41,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:41,262 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:41,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2138 [2021-07-09 18:30:41,480 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-07-09 18:30:41,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:41,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368169907] [2021-07-09 18:30:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:41,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:41,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368169907] [2021-07-09 18:30:41,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368169907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:41,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794369501] [2021-07-09 18:30:41,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:41,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:30:41,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:41,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:42,298 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-09 18:30:42,421 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_287], 6=[v_prenex_285, v_prenex_289]} [2021-07-09 18:30:42,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:42,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:42,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:30:42,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:42,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:42,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-09 18:30:42,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:42,531 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-07-09 18:30:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:30:42,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:42,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:30:42,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:42,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:42,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:42,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:30:42,605 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:42,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:42,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:30:42,631 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-07-09 18:30:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:42,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794369501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:42,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:42,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:30:42,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282845144] [2021-07-09 18:30:42,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:30:42,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:42,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:30:42,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:30:42,673 INFO L87 Difference]: Start difference. First operand 1888 states and 6415 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:43,899 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-07-09 18:30:44,071 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-07-09 18:30:44,528 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-07-09 18:30:44,687 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:30:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:44,876 INFO L93 Difference]: Finished difference Result 2395 states and 7935 transitions. [2021-07-09 18:30:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:30:44,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:30:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:44,881 INFO L225 Difference]: With dead ends: 2395 [2021-07-09 18:30:44,881 INFO L226 Difference]: Without dead ends: 2380 [2021-07-09 18:30:44,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2407.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:30:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-07-09 18:30:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1886. [2021-07-09 18:30:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-07-09 18:30:44,913 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-07-09 18:30:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:44,913 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-07-09 18:30:44,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-07-09 18:30:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:30:44,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:44,916 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:45,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2263 [2021-07-09 18:30:45,129 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:45,129 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-07-09 18:30:45,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:45,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500194895] [2021-07-09 18:30:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:45,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:45,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500194895] [2021-07-09 18:30:45,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500194895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:45,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196238771] [2021-07-09 18:30:45,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:45,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:30:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:30:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:46,010 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-09 18:30:46,219 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 18:30:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:46,431 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:30:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-09 18:30:46,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:46,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:46,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:46,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 18:30:46,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:46,907 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:30:46,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:46,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:46,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:46,951 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:30:46,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-09 18:30:46,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:46,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:46,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:46,983 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:30:46,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-09 18:30:46,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:47,356 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-09 18:30:47,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,389 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:30:47,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:30:47,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:47,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,443 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:30:47,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-09 18:30:47,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:47,806 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-09 18:30:47,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,840 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:30:47,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 18:30:47,841 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:47,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:30:47,872 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:48,458 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2021-07-09 18:30:48,459 INFO L628 ElimStorePlain]: treesize reduction 36, result has 94.8 percent of original size [2021-07-09 18:30:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:48,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:48,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:30:48,495 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:48,522 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:30:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:30:48,526 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,075 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-07-09 18:30:49,075 INFO L628 ElimStorePlain]: treesize reduction 38, result has 94.0 percent of original size [2021-07-09 18:30:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,103 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:30:49,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:30:49,105 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,131 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:30:49,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:30:49,134 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,412 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:30:49,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,442 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:30:49,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:30:49,446 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,458 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:30:49,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:30:49,459 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,669 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:30:49,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:49,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,694 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:30:49,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:30:49,695 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,723 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:30:49,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:30:49,726 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:50,086 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-07-09 18:30:50,086 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.7 percent of original size [2021-07-09 18:30:50,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-09 18:30:50,099 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:841, output treesize:391 [2021-07-09 18:30:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:50,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196238771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:50,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:50,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-09 18:30:50,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103765729] [2021-07-09 18:30:50,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:30:50,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:30:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:30:50,270 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:50,596 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-09 18:30:50,881 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:30:51,023 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 18:30:55,312 WARN L205 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-07-09 18:30:58,163 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-07-09 18:30:59,074 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 154 [2021-07-09 18:30:59,280 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-09 18:30:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:59,563 INFO L93 Difference]: Finished difference Result 2712 states and 8977 transitions. [2021-07-09 18:30:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:30:59,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:30:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:59,569 INFO L225 Difference]: With dead ends: 2712 [2021-07-09 18:30:59,569 INFO L226 Difference]: Without dead ends: 2682 [2021-07-09 18:30:59,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 9553.5ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:30:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-07-09 18:30:59,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1886. [2021-07-09 18:30:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-07-09 18:30:59,596 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-07-09 18:30:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:59,596 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-07-09 18:30:59,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-07-09 18:30:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:30:59,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:59,599 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:59,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-07-09 18:30:59,815 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:59,816 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 54 times [2021-07-09 18:30:59,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:59,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054150632] [2021-07-09 18:30:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:00,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:00,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054150632] [2021-07-09 18:31:00,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054150632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:00,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075331491] [2021-07-09 18:31:00,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:00,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:31:00,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:00,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:00,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,565 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:31:00,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:31:00,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,599 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:31:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:31:00,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,623 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:31:00,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,643 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:31:00,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,674 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-09 18:31:00,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-09 18:31:00,679 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:00,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 18:31:00,713 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,733 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:31:00,734 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,752 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:31:00,753 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,773 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:31:00,774 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,815 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-09 18:31:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:31:00,816 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,833 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:31:00,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,852 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:31:00,853 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,870 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:31:00,871 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,888 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:31:00,889 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,905 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:31:00,906 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,916 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:31:00,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:31:00,917 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:00,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:31:00,960 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-07-09 18:31:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:01,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075331491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:01,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:01,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:31:01,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496983027] [2021-07-09 18:31:01,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:31:01,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:01,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:31:01,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:31:01,059 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:01,963 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-09 18:31:02,483 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-09 18:31:03,122 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-07-09 18:31:03,463 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-09 18:31:03,785 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-09 18:31:03,996 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-09 18:31:04,163 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-09 18:31:04,363 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-07-09 18:31:04,732 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-09 18:31:04,916 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-07-09 18:31:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:05,131 INFO L93 Difference]: Finished difference Result 3398 states and 10882 transitions. [2021-07-09 18:31:05,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:31:05,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:05,137 INFO L225 Difference]: With dead ends: 3398 [2021-07-09 18:31:05,137 INFO L226 Difference]: Without dead ends: 3364 [2021-07-09 18:31:05,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4033.1ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:31:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-07-09 18:31:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1892. [2021-07-09 18:31:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.405076679005817) internal successors, (6439), 1891 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6439 transitions. [2021-07-09 18:31:05,190 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6439 transitions. Word has length 26 [2021-07-09 18:31:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:05,190 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6439 transitions. [2021-07-09 18:31:05,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6439 transitions. [2021-07-09 18:31:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:05,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:05,192 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:05,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2347 [2021-07-09 18:31:05,408 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 33 times [2021-07-09 18:31:05,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:05,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899573437] [2021-07-09 18:31:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:05,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:05,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899573437] [2021-07-09 18:31:05,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899573437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:05,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483832370] [2021-07-09 18:31:05,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:05,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:31:05,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:31:05,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:06,276 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-09 18:31:06,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:06,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:06,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:06,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:06,550 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:31:06,550 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-07-09 18:31:06,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:06,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:06,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:06,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:06,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:06,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:06,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:06,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:06,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:06,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:06,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:06,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:06,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:06,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:06,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:06,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:06,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:31:06,729 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-07-09 18:31:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:06,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483832370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:06,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:06,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:31:06,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269221350] [2021-07-09 18:31:06,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:31:06,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:31:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:31:06,800 INFO L87 Difference]: Start difference. First operand 1892 states and 6439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:07,547 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-09 18:31:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:07,735 INFO L93 Difference]: Finished difference Result 2313 states and 7725 transitions. [2021-07-09 18:31:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:31:07,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:07,739 INFO L225 Difference]: With dead ends: 2313 [2021-07-09 18:31:07,740 INFO L226 Difference]: Without dead ends: 2298 [2021-07-09 18:31:07,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1421.5ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-09 18:31:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1884. [2021-07-09 18:31:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.4083908656399364) internal successors, (6418), 1883 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6418 transitions. [2021-07-09 18:31:07,764 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6418 transitions. Word has length 26 [2021-07-09 18:31:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:07,764 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6418 transitions. [2021-07-09 18:31:07,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6418 transitions. [2021-07-09 18:31:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:07,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:07,767 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:07,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-07-09 18:31:07,983 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:07,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1200955766, now seen corresponding path program 34 times [2021-07-09 18:31:07,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:07,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198838028] [2021-07-09 18:31:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:08,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:08,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198838028] [2021-07-09 18:31:08,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198838028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:08,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557662830] [2021-07-09 18:31:08,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:08,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:08,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:08,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:08,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:08,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:08,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:08,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:31:08,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:08,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:08,758 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:08,764 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:31:08,771 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:08,777 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:08,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:08,789 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:08,795 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:31:08,800 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:08,805 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:08,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:08,809 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,885 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:31:08,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:31:08,887 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:31:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557662830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:08,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:08,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:31:08,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685319524] [2021-07-09 18:31:08,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:31:08,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:31:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:31:08,940 INFO L87 Difference]: Start difference. First operand 1884 states and 6418 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:09,230 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-09 18:31:09,353 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-07-09 18:31:09,574 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-07-09 18:31:10,032 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-09 18:31:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:10,233 INFO L93 Difference]: Finished difference Result 2549 states and 8455 transitions. [2021-07-09 18:31:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:31:10,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:10,238 INFO L225 Difference]: With dead ends: 2549 [2021-07-09 18:31:10,238 INFO L226 Difference]: Without dead ends: 2534 [2021-07-09 18:31:10,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1525.9ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:31:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-07-09 18:31:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1876. [2021-07-09 18:31:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.4074666666666666) internal successors, (6389), 1875 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6389 transitions. [2021-07-09 18:31:10,264 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6389 transitions. Word has length 26 [2021-07-09 18:31:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:10,265 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 6389 transitions. [2021-07-09 18:31:10,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6389 transitions. [2021-07-09 18:31:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:10,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:10,267 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:10,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:10,483 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -179287784, now seen corresponding path program 35 times [2021-07-09 18:31:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:10,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382973839] [2021-07-09 18:31:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:10,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:10,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382973839] [2021-07-09 18:31:10,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382973839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:10,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427881862] [2021-07-09 18:31:10,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:10,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:31:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:10,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:31:10,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,401 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:31:11,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:31:11,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:11,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:31:11,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:11,572 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 18:31:11,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:11,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,596 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:11,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:31:11,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:11,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,618 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:11,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:31:11,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:11,764 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 18:31:11,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:11,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:31:11,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:11,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,801 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:31:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:11,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:11,941 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:31:11,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:11,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,962 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:11,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:31:11,966 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:31:11,983 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:12,109 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-09 18:31:12,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:12,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:12,130 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:314 [2021-07-09 18:31:12,378 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-09 18:31:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:12,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427881862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:12,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:12,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:31:12,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286615443] [2021-07-09 18:31:12,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:31:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:12,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:31:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:31:12,483 INFO L87 Difference]: Start difference. First operand 1876 states and 6389 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:13,201 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-09 18:31:13,389 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-07-09 18:31:13,695 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-09 18:31:14,067 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-09 18:31:14,289 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-09 18:31:14,573 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-09 18:31:14,886 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-07-09 18:31:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:14,956 INFO L93 Difference]: Finished difference Result 2284 states and 7582 transitions. [2021-07-09 18:31:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:31:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:14,960 INFO L225 Difference]: With dead ends: 2284 [2021-07-09 18:31:14,961 INFO L226 Difference]: Without dead ends: 2269 [2021-07-09 18:31:14,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2562.2ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:31:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-07-09 18:31:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1867. [2021-07-09 18:31:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.404608788853162) internal successors, (6353), 1866 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6353 transitions. [2021-07-09 18:31:14,985 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6353 transitions. Word has length 26 [2021-07-09 18:31:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:14,985 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6353 transitions. [2021-07-09 18:31:14,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6353 transitions. [2021-07-09 18:31:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:14,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:14,988 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:15,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2424,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:15,204 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:15,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 36 times [2021-07-09 18:31:15,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:15,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672908802] [2021-07-09 18:31:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:15,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:15,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672908802] [2021-07-09 18:31:15,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672908802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:15,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653006820] [2021-07-09 18:31:15,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:15,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:31:15,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:31:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:15,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:15,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,781 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:15,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:15,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,789 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:15,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:15,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,800 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:15,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:15,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:15,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,822 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:15,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:15,824 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:15,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:15,832 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:31:15,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:15,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:31:15,851 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:31:15,864 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,872 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:15,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:31:15,873 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:15,885 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,895 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:15,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:31:15,896 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:15,908 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,916 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:15,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:15,916 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,921 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:15,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:15,922 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:15,998 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:31:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:16,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653006820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:16,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:16,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:31:16,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886155873] [2021-07-09 18:31:16,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:31:16,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:16,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:31:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:31:16,192 INFO L87 Difference]: Start difference. First operand 1867 states and 6353 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:16,762 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-09 18:31:17,107 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-07-09 18:31:17,412 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-09 18:31:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:17,597 INFO L93 Difference]: Finished difference Result 2064 states and 6910 transitions. [2021-07-09 18:31:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:31:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:17,601 INFO L225 Difference]: With dead ends: 2064 [2021-07-09 18:31:17,601 INFO L226 Difference]: Without dead ends: 2049 [2021-07-09 18:31:17,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1654.5ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:31:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-09 18:31:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1860. [2021-07-09 18:31:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-07-09 18:31:17,630 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-07-09 18:31:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:17,630 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-07-09 18:31:17,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-07-09 18:31:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:17,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:17,634 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:17,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:17,851 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:17,851 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 37 times [2021-07-09 18:31:17,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:17,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695538424] [2021-07-09 18:31:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:18,121 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-07-09 18:31:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:18,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:18,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695538424] [2021-07-09 18:31:18,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695538424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:18,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058977864] [2021-07-09 18:31:18,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:31:18,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:18,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:18,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:18,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:18,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:31:18,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:31:18,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:18,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:18,726 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:18,731 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:18,736 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:18,742 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:18,747 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:31:18,752 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:18,757 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:18,762 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:18,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:18,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:18,765 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:18,834 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:31:18,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:31:18,835 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:31:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058977864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:18,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:18,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:31:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814957217] [2021-07-09 18:31:18,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:31:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:31:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:31:18,882 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:19,469 INFO L93 Difference]: Finished difference Result 2341 states and 7786 transitions. [2021-07-09 18:31:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:31:19,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:19,473 INFO L225 Difference]: With dead ends: 2341 [2021-07-09 18:31:19,473 INFO L226 Difference]: Without dead ends: 2320 [2021-07-09 18:31:19,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-09 18:31:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1860. [2021-07-09 18:31:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-07-09 18:31:19,497 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-07-09 18:31:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:19,497 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-07-09 18:31:19,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-07-09 18:31:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:19,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:19,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:19,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2508 [2021-07-09 18:31:19,717 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 38 times [2021-07-09 18:31:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:19,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073498830] [2021-07-09 18:31:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:20,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073498830] [2021-07-09 18:31:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073498830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258646713] [2021-07-09 18:31:20,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:20,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:31:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:20,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,473 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:20,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,482 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:31:20,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,492 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:20,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:31:20,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,502 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:20,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:20,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,511 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:20,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:20,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,520 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:20,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:20,521 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:20,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:20,536 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:20,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:20,549 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,558 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:20,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:20,559 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:31:20,571 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:20,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:20,586 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:20,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:31:20,600 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,612 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:20,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:20,614 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,625 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:20,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:20,627 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:20,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:31:20,639 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,645 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:20,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:20,646 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:20,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:20,742 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-09 18:31:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:20,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258646713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:20,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:20,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:31:20,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74720828] [2021-07-09 18:31:20,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:31:20,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:31:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:31:20,947 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:21,531 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-09 18:31:22,144 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-07-09 18:31:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:22,199 INFO L93 Difference]: Finished difference Result 2236 states and 7452 transitions. [2021-07-09 18:31:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:31:22,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:22,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:22,204 INFO L225 Difference]: With dead ends: 2236 [2021-07-09 18:31:22,204 INFO L226 Difference]: Without dead ends: 2207 [2021-07-09 18:31:22,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1529.6ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:31:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-07-09 18:31:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1840. [2021-07-09 18:31:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3953235454051116) internal successors, (6244), 1839 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6244 transitions. [2021-07-09 18:31:22,234 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6244 transitions. Word has length 26 [2021-07-09 18:31:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:22,234 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6244 transitions. [2021-07-09 18:31:22,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6244 transitions. [2021-07-09 18:31:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:22,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:22,237 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:22,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-07-09 18:31:22,452 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:22,452 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-07-09 18:31:22,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:22,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948463541] [2021-07-09 18:31:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:22,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948463541] [2021-07-09 18:31:22,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948463541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133599366] [2021-07-09 18:31:22,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:22,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:31:22,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:22,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:31:22,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:23,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:23,207 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:23,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:31:23,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:23,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:23,234 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:23,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:31:23,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:23,398 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:31:23,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:23,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:23,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:23,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:31:23,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:23,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:23,442 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:23,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:31:23,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:23,748 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-09 18:31:23,748 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-07-09 18:31:23,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:23,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:31:23,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:23,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:23,791 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:31:23,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:31:23,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:23,931 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 18:31:23,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:23,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:23,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:23,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:31:23,956 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:23,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:23,973 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:31:23,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:23,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:24,226 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-09 18:31:24,226 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-07-09 18:31:24,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:24,261 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-07-09 18:31:24,454 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:31:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:24,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133599366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:24,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:24,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:31:24,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613437249] [2021-07-09 18:31:24,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:31:24,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:24,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:31:24,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:31:24,551 INFO L87 Difference]: Start difference. First operand 1840 states and 6244 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:25,181 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 18:31:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:25,392 INFO L93 Difference]: Finished difference Result 2047 states and 6843 transitions. [2021-07-09 18:31:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:31:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:25,396 INFO L225 Difference]: With dead ends: 2047 [2021-07-09 18:31:25,397 INFO L226 Difference]: Without dead ends: 2022 [2021-07-09 18:31:25,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1274.9ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-07-09 18:31:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1822. [2021-07-09 18:31:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.399231191652938) internal successors, (6190), 1821 states have internal predecessors, (6190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6190 transitions. [2021-07-09 18:31:25,426 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6190 transitions. Word has length 26 [2021-07-09 18:31:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:25,426 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6190 transitions. [2021-07-09 18:31:25,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6190 transitions. [2021-07-09 18:31:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:25,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:25,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:25,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:25,646 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:25,646 INFO L82 PathProgramCache]: Analyzing trace with hash 827344434, now seen corresponding path program 40 times [2021-07-09 18:31:25,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:25,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441714151] [2021-07-09 18:31:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:25,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:25,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441714151] [2021-07-09 18:31:25,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441714151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:25,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783224729] [2021-07-09 18:31:25,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:26,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:26,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:26,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:26,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:26,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,243 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:26,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:31:26,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:26,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:31:26,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,272 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:26,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:31:26,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:26,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:31:26,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,296 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:26,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:31:26,297 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:26,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-09 18:31:26,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,323 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:26,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:31:26,323 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:26,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:31:26,340 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:26,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:31:26,353 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:26,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-09 18:31:26,370 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,381 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:26,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:31:26,382 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,393 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:26,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:31:26,394 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,407 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:26,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:31:26,409 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,420 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:26,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:31:26,420 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:26,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:31:26,434 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:26,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:26,443 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:26,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-09 18:31:26,445 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:26,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:26,520 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-09 18:31:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:26,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783224729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:26,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:26,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:31:26,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77890479] [2021-07-09 18:31:26,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:31:26,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:26,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:31:26,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:31:26,720 INFO L87 Difference]: Start difference. First operand 1822 states and 6190 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:27,302 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-07-09 18:31:27,864 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 18:31:28,007 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-09 18:31:28,291 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:31:28,607 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-09 18:31:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:28,674 INFO L93 Difference]: Finished difference Result 2419 states and 8019 transitions. [2021-07-09 18:31:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:31:28,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:28,679 INFO L225 Difference]: With dead ends: 2419 [2021-07-09 18:31:28,679 INFO L226 Difference]: Without dead ends: 2400 [2021-07-09 18:31:28,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2135.3ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:31:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-07-09 18:31:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1803. [2021-07-09 18:31:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.3990011098779136) internal successors, (6125), 1802 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 6125 transitions. [2021-07-09 18:31:28,705 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 6125 transitions. Word has length 26 [2021-07-09 18:31:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:28,705 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 6125 transitions. [2021-07-09 18:31:28,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 6125 transitions. [2021-07-09 18:31:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:28,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:28,707 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:28,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2637,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:28,923 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:28,923 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-07-09 18:31:28,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:28,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705575559] [2021-07-09 18:31:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:29,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705575559] [2021-07-09 18:31:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705575559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104173017] [2021-07-09 18:31:29,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:29,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:31:29,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:29,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:31:29,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:29,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:29,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:29,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:29,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:29,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:31:29,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:29,822 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:31:29,827 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:31:29,832 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:29,838 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:29,843 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:29,848 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:29,853 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:29,858 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:29,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:29,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:29,862 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,940 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:31:29,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:31:29,942 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:31:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:30,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104173017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:30,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:30,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:31:30,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699846050] [2021-07-09 18:31:30,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:31:30,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:31:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:31:30,027 INFO L87 Difference]: Start difference. First operand 1803 states and 6125 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:30,582 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-09 18:31:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:30,906 INFO L93 Difference]: Finished difference Result 2310 states and 7688 transitions. [2021-07-09 18:31:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:31:30,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:30,910 INFO L225 Difference]: With dead ends: 2310 [2021-07-09 18:31:30,911 INFO L226 Difference]: Without dead ends: 2295 [2021-07-09 18:31:30,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1180.3ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:31:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-09 18:31:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1848. [2021-07-09 18:31:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-07-09 18:31:30,935 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-07-09 18:31:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:30,935 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-07-09 18:31:30,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-07-09 18:31:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:30,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:30,937 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:31,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-07-09 18:31:31,140 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:31,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:31,140 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-07-09 18:31:31,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:31,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281252072] [2021-07-09 18:31:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:31,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281252072] [2021-07-09 18:31:31,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281252072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859280963] [2021-07-09 18:31:31,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:31,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:31:31,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:31:31,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:31,860 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:31:31,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:31,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:31,878 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:31:31,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:31:31,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:31,887 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:31:31,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:31,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:31,905 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:31:31,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:31,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:31,916 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:31:31,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:31,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:31,926 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:31:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:31:31,927 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:31,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:31,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:31:31,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:31,968 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:31,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:31:31,972 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:31,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:31,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:31:31,990 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:32,035 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:32,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:31:32,037 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:32,047 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:31:32,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:32,048 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:32,058 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:31:32,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:31:32,059 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:32,080 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:32,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:31:32,084 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:32,094 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:31:32,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:32,095 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:32,105 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:31:32,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:32,105 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:32,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:31:32,120 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:32,240 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-09 18:31:32,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:32,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:32,253 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-07-09 18:31:32,480 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 18:31:32,694 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-09 18:31:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:32,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859280963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:32,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:32,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:31:32,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963978090] [2021-07-09 18:31:32,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:31:32,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:32,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:31:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:31:32,812 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:33,281 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-07-09 18:31:33,646 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-09 18:31:33,838 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-07-09 18:31:34,029 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-09 18:31:34,287 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-07-09 18:31:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:34,354 INFO L93 Difference]: Finished difference Result 2570 states and 8519 transitions. [2021-07-09 18:31:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:31:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:34,358 INFO L225 Difference]: With dead ends: 2570 [2021-07-09 18:31:34,358 INFO L226 Difference]: Without dead ends: 2555 [2021-07-09 18:31:34,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2117.9ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:31:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-07-09 18:31:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1848. [2021-07-09 18:31:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-07-09 18:31:34,386 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-07-09 18:31:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:34,386 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-07-09 18:31:34,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-07-09 18:31:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:34,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:34,388 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:34,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2690 [2021-07-09 18:31:34,605 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-07-09 18:31:34,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:34,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556927284] [2021-07-09 18:31:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:34,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556927284] [2021-07-09 18:31:34,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556927284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756973195] [2021-07-09 18:31:34,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:34,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:31:34,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:35,176 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_327, v_prenex_329], 3=[A, v_prenex_331]} [2021-07-09 18:31:35,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:35,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:35,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:35,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:35,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:35,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:35,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:35,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:35,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:35,334 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-09 18:31:35,335 INFO L628 ElimStorePlain]: treesize reduction 129, result has 54.9 percent of original size [2021-07-09 18:31:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:35,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:35,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:35,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:35,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:35,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:35,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:35,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:31:35,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:35,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:35,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:35,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:31:35,444 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:35,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:35,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:31:35,485 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:325, output treesize:51 [2021-07-09 18:31:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:35,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756973195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:35,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:35,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:31:35,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740028523] [2021-07-09 18:31:35,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:31:35,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:35,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:31:35,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:31:35,547 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:36,223 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-07-09 18:31:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:36,335 INFO L93 Difference]: Finished difference Result 2415 states and 7997 transitions. [2021-07-09 18:31:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:31:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:36,339 INFO L225 Difference]: With dead ends: 2415 [2021-07-09 18:31:36,339 INFO L226 Difference]: Without dead ends: 2385 [2021-07-09 18:31:36,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1038.8ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:31:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-07-09 18:31:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1850. [2021-07-09 18:31:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.3958896700919414) internal successors, (6279), 1849 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6279 transitions. [2021-07-09 18:31:36,365 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6279 transitions. Word has length 26 [2021-07-09 18:31:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:36,365 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 6279 transitions. [2021-07-09 18:31:36,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6279 transitions. [2021-07-09 18:31:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:36,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:36,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:36,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-07-09 18:31:36,583 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:36,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-07-09 18:31:36,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:36,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985571105] [2021-07-09 18:31:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:36,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:36,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985571105] [2021-07-09 18:31:36,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985571105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:36,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505125020] [2021-07-09 18:31:36,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:36,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:31:36,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:31:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:37,113 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-07-09 18:31:37,261 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-09 18:31:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:37,448 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:37,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:31:37,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:37,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:37,503 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:37,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:31:37,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:37,667 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:31:37,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:37,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:37,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:37,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:31:37,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:37,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:37,709 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:31:37,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:31:37,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:37,862 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:31:37,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:37,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:37,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:37,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:31:37,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:37,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:37,903 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:31:37,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:31:37,904 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:38,196 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-07-09 18:31:38,197 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-07-09 18:31:38,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:38,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:38,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:31:38,220 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:38,236 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:31:38,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:38,237 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:38,490 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-09 18:31:38,491 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-07-09 18:31:38,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:38,506 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:256 [2021-07-09 18:31:38,704 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 18:31:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:38,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505125020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:38,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:38,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:31:38,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570582311] [2021-07-09 18:31:38,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:31:38,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:38,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:31:38,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:31:38,802 INFO L87 Difference]: Start difference. First operand 1850 states and 6279 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:39,287 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-07-09 18:31:39,806 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-09 18:31:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:39,834 INFO L93 Difference]: Finished difference Result 2425 states and 8078 transitions. [2021-07-09 18:31:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:31:39,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:39,838 INFO L225 Difference]: With dead ends: 2425 [2021-07-09 18:31:39,838 INFO L226 Difference]: Without dead ends: 2410 [2021-07-09 18:31:39,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1595.3ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:31:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-09 18:31:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1868. [2021-07-09 18:31:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.392072844134976) internal successors, (6333), 1867 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6333 transitions. [2021-07-09 18:31:39,864 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6333 transitions. Word has length 26 [2021-07-09 18:31:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:39,864 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6333 transitions. [2021-07-09 18:31:39,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6333 transitions. [2021-07-09 18:31:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:39,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:39,866 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:40,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:40,081 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-07-09 18:31:40,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:40,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845700207] [2021-07-09 18:31:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:40,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845700207] [2021-07-09 18:31:40,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845700207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663662069] [2021-07-09 18:31:40,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:40,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:31:40,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:40,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:40,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:40,876 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:31:41,139 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-07-09 18:31:41,218 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_349, v_prenex_347], 2=[A, v_prenex_348]} [2021-07-09 18:31:41,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:41,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:41,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:41,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:31:41,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:41,398 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-09 18:31:41,399 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-07-09 18:31:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:41,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:31:41,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:41,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:41,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:41,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:41,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:41,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:41,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:41,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:41,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:31:41,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:41,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:41,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:41,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:41,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:41,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:41,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:41,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:31:41,560 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:285, output treesize:51 [2021-07-09 18:31:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:41,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663662069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:41,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:41,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:31:41,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994538755] [2021-07-09 18:31:41,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:31:41,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:31:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:31:41,618 INFO L87 Difference]: Start difference. First operand 1868 states and 6333 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:42,487 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:31:42,746 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-07-09 18:31:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:42,861 INFO L93 Difference]: Finished difference Result 2321 states and 7745 transitions. [2021-07-09 18:31:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:31:42,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:42,866 INFO L225 Difference]: With dead ends: 2321 [2021-07-09 18:31:42,866 INFO L226 Difference]: Without dead ends: 2306 [2021-07-09 18:31:42,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1784.5ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:31:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-09 18:31:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1889. [2021-07-09 18:31:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3887711864406778) internal successors, (6398), 1888 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6398 transitions. [2021-07-09 18:31:42,897 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6398 transitions. Word has length 26 [2021-07-09 18:31:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:42,898 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 6398 transitions. [2021-07-09 18:31:42,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6398 transitions. [2021-07-09 18:31:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:42,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:42,901 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:43,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-07-09 18:31:43,101 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:43,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-07-09 18:31:43,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:43,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958125539] [2021-07-09 18:31:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:43,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:43,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958125539] [2021-07-09 18:31:43,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958125539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:43,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844682569] [2021-07-09 18:31:43,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:43,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:43,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:43,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:43,876 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-09 18:31:43,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:43,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:43,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:43,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:44,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:31:44,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:44,162 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:44,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:44,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:44,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:44,382 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:44,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:31:44,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,489 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 18:31:44,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:44,501 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:44,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:44,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:44,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:44,613 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:44,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:31:44,721 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:44,817 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:31:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:45,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844682569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:45,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:45,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:31:45,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431967421] [2021-07-09 18:31:45,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:31:45,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:45,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:31:45,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:31:45,004 INFO L87 Difference]: Start difference. First operand 1889 states and 6398 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:45,758 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:31:46,111 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-09 18:31:46,434 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-09 18:31:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:46,648 INFO L93 Difference]: Finished difference Result 2617 states and 8667 transitions. [2021-07-09 18:31:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:31:46,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:46,653 INFO L225 Difference]: With dead ends: 2617 [2021-07-09 18:31:46,653 INFO L226 Difference]: Without dead ends: 2602 [2021-07-09 18:31:46,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1982.5ms TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:31:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-07-09 18:31:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1886. [2021-07-09 18:31:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.389920424403183) internal successors, (6390), 1885 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6390 transitions. [2021-07-09 18:31:46,681 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6390 transitions. Word has length 26 [2021-07-09 18:31:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:46,681 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6390 transitions. [2021-07-09 18:31:46,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6390 transitions. [2021-07-09 18:31:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:46,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:46,683 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:46,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2825,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:46,899 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:46,899 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-07-09 18:31:46,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:46,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969411164] [2021-07-09 18:31:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:47,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969411164] [2021-07-09 18:31:47,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969411164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654682991] [2021-07-09 18:31:47,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:47,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:31:47,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:47,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:31:47,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:47,584 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-09 18:31:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:47,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:47,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:31:47,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:47,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:47,734 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:47,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:47,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:47,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:47,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:47,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:31:47,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:47,851 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:47,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:47,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:47,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:47,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:47,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:47,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:47,972 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:47,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:31:47,974 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:48,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:48,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:48,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:48,082 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:48,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:48,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:48,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:48,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:48,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:48,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:48,188 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-07-09 18:31:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:48,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654682991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:48,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:48,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:31:48,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406017511] [2021-07-09 18:31:48,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:31:48,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:31:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:31:48,376 INFO L87 Difference]: Start difference. First operand 1886 states and 6390 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:49,309 INFO L93 Difference]: Finished difference Result 2461 states and 8175 transitions. [2021-07-09 18:31:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:31:49,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:49,314 INFO L225 Difference]: With dead ends: 2461 [2021-07-09 18:31:49,314 INFO L226 Difference]: Without dead ends: 2436 [2021-07-09 18:31:49,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1329.2ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:31:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-07-09 18:31:49,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1886. [2021-07-09 18:31:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-07-09 18:31:49,347 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-07-09 18:31:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:49,348 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-07-09 18:31:49,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-07-09 18:31:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:49,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:49,351 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:49,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-07-09 18:31:49,570 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-07-09 18:31:49,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:49,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178487753] [2021-07-09 18:31:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:49,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:49,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178487753] [2021-07-09 18:31:49,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178487753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730547865] [2021-07-09 18:31:49,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:50,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:31:50,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:50,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:31:50,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:50,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:50,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,216 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:50,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:50,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,225 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:50,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:50,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:50,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:50,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:50,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:50,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,262 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:50,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:31:50,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:50,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:31:50,274 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:31:50,286 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,295 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:50,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:31:50,296 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:50,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:31:50,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,319 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:31:50,320 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:50,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:31:50,334 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,346 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:31:50,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:31:50,347 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:50,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:31:50,362 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,371 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:50,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:50,372 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:50,377 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:31:50,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:31:50,378 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:50,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:50,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:31:50,455 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:31:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:50,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730547865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:50,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:50,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:31:50,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957279891] [2021-07-09 18:31:50,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:31:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:31:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:31:50,665 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:51,402 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 18:31:51,601 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-09 18:31:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:51,662 INFO L93 Difference]: Finished difference Result 2412 states and 8043 transitions. [2021-07-09 18:31:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:31:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:51,667 INFO L225 Difference]: With dead ends: 2412 [2021-07-09 18:31:51,667 INFO L226 Difference]: Without dead ends: 2397 [2021-07-09 18:31:51,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1337.1ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:31:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-09 18:31:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1886. [2021-07-09 18:31:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:51,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-07-09 18:31:51,699 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-07-09 18:31:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:51,699 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-07-09 18:31:51,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:51,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-07-09 18:31:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:51,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:51,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:51,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:51,919 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:51,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:51,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-07-09 18:31:51,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:51,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387838068] [2021-07-09 18:31:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:52,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:52,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387838068] [2021-07-09 18:31:52,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387838068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:52,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910824545] [2021-07-09 18:31:52,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:52,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:31:52,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:31:52,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:31:52,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:31:52,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:31:52,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:31:52,749 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:31:52,757 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:31:52,763 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:31:52,770 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:31:52,777 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:31:52,784 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:31:52,792 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:31:52,798 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:31:52,805 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:52,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:52,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:31:52,809 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,833 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-09 18:31:52,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:52,835 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:31:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:52,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910824545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:52,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:52,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:31:52,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992271097] [2021-07-09 18:31:52,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:31:52,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:52,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:31:52,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:31:52,863 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:53,563 INFO L93 Difference]: Finished difference Result 2181 states and 7107 transitions. [2021-07-09 18:31:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:31:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:53,568 INFO L225 Difference]: With dead ends: 2181 [2021-07-09 18:31:53,568 INFO L226 Difference]: Without dead ends: 2144 [2021-07-09 18:31:53,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 928.8ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:31:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-07-09 18:31:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1906. [2021-07-09 18:31:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.391076115485564) internal successors, (6460), 1905 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6460 transitions. [2021-07-09 18:31:53,600 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6460 transitions. Word has length 26 [2021-07-09 18:31:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:53,600 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6460 transitions. [2021-07-09 18:31:53,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6460 transitions. [2021-07-09 18:31:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:53,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:53,603 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:53,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-07-09 18:31:53,817 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-07-09 18:31:53,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:53,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613501642] [2021-07-09 18:31:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:54,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:54,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613501642] [2021-07-09 18:31:54,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613501642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:54,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818437508] [2021-07-09 18:31:54,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:54,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:31:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:54,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:54,406 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_376, v_prenex_378], 6=[A, v_prenex_374]} [2021-07-09 18:31:54,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-07-09 18:31:54,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:31:54,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:54,513 INFO L628 ElimStorePlain]: treesize reduction 156, result has 44.9 percent of original size [2021-07-09 18:31:54,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:31:54,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:54,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:31:54,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:54,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:31:54,588 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:54,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:54,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:31:54,617 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:41 [2021-07-09 18:31:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:54,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818437508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:54,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:54,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:31:54,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770876444] [2021-07-09 18:31:54,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:31:54,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:54,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:31:54,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:31:54,667 INFO L87 Difference]: Start difference. First operand 1906 states and 6460 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:55,651 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-07-09 18:31:55,775 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 18:31:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:55,870 INFO L93 Difference]: Finished difference Result 2358 states and 7788 transitions. [2021-07-09 18:31:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:31:55,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:31:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:55,874 INFO L225 Difference]: With dead ends: 2358 [2021-07-09 18:31:55,875 INFO L226 Difference]: Without dead ends: 2312 [2021-07-09 18:31:55,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1387.5ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:31:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-07-09 18:31:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1906. [2021-07-09 18:31:55,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.3858267716535435) internal successors, (6450), 1905 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6450 transitions. [2021-07-09 18:31:55,905 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6450 transitions. Word has length 26 [2021-07-09 18:31:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:55,906 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6450 transitions. [2021-07-09 18:31:55,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6450 transitions. [2021-07-09 18:31:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:31:55,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:55,909 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:56,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-07-09 18:31:56,123 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:56,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-07-09 18:31:56,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:56,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109832325] [2021-07-09 18:31:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:56,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:56,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109832325] [2021-07-09 18:31:56,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109832325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:56,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087107825] [2021-07-09 18:31:56,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:56,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:31:56,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:56,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:31:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:56,899 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:31:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,203 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:31:57,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-09 18:31:57,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:57,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,233 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:31:57,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:31:57,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:57,579 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-07-09 18:31:57,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:57,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,615 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:31:57,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:31:57,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,643 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:31:57,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:31:57,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:57,958 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-09 18:31:57,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:57,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,990 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:31:57,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-09 18:31:57,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:58,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,030 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:31:58,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-09 18:31:58,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:58,331 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-09 18:31:58,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:58,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,359 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:31:58,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-09 18:31:58,361 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:58,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 18:31:58,390 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:58,718 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:31:58,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,752 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:31:58,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-07-09 18:31:58,753 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:58,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:58,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:58,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:31:58,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:59,326 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-07-09 18:31:59,327 INFO L628 ElimStorePlain]: treesize reduction 33, result has 94.4 percent of original size [2021-07-09 18:31:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,356 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:31:59,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:31:59,361 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,373 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:31:59,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:31:59,374 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:59,611 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:31:59,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,643 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:31:59,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:31:59,646 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,666 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:31:59,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-09 18:31:59,668 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:59,890 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:31:59,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:59,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,923 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:31:59,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:31:59,927 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:59,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:59,940 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:31:59,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:31:59,941 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:00,119 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:32:00,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:00,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-09 18:32:00,131 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:340 [2021-07-09 18:32:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:00,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087107825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:00,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:00,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:32:00,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683378272] [2021-07-09 18:32:00,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:32:00,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:32:00,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:32:00,294 INFO L87 Difference]: Start difference. First operand 1906 states and 6450 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:01,418 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 18:32:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:01,727 INFO L93 Difference]: Finished difference Result 2168 states and 7234 transitions. [2021-07-09 18:32:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:32:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:01,732 INFO L225 Difference]: With dead ends: 2168 [2021-07-09 18:32:01,732 INFO L226 Difference]: Without dead ends: 2153 [2021-07-09 18:32:01,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1616.3ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:32:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-07-09 18:32:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1921. [2021-07-09 18:32:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.3921875) internal successors, (6513), 1920 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6513 transitions. [2021-07-09 18:32:01,757 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6513 transitions. Word has length 26 [2021-07-09 18:32:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:01,757 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6513 transitions. [2021-07-09 18:32:01,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6513 transitions. [2021-07-09 18:32:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:01,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:01,759 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:01,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:01,976 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:01,976 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-07-09 18:32:01,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:01,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674223542] [2021-07-09 18:32:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:02,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:02,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674223542] [2021-07-09 18:32:02,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674223542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:02,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588089979] [2021-07-09 18:32:02,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:02,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:32:02,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:02,702 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-09 18:32:02,874 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:32:03,243 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-07-09 18:32:03,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:03,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:03,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:03,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:03,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:32:03,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,410 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-09 18:32:03,410 INFO L628 ElimStorePlain]: treesize reduction 44, result has 75.1 percent of original size [2021-07-09 18:32:03,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:03,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:03,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:03,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:03,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:03,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:03,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:03,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:03,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:03,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:32:03,517 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-07-09 18:32:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:03,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588089979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:03,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:03,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:32:03,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090661047] [2021-07-09 18:32:03,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:32:03,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:03,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:32:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:32:03,588 INFO L87 Difference]: Start difference. First operand 1921 states and 6513 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:04,231 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-09 18:32:04,856 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2021-07-09 18:32:05,279 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-07-09 18:32:05,752 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-07-09 18:32:06,204 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2021-07-09 18:32:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:06,408 INFO L93 Difference]: Finished difference Result 2468 states and 8139 transitions. [2021-07-09 18:32:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:32:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:06,413 INFO L225 Difference]: With dead ends: 2468 [2021-07-09 18:32:06,413 INFO L226 Difference]: Without dead ends: 2453 [2021-07-09 18:32:06,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3343.5ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:32:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-07-09 18:32:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1932. [2021-07-09 18:32:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.392542723977214) internal successors, (6551), 1931 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6551 transitions. [2021-07-09 18:32:06,447 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6551 transitions. Word has length 26 [2021-07-09 18:32:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:06,447 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6551 transitions. [2021-07-09 18:32:06,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6551 transitions. [2021-07-09 18:32:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:06,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:06,450 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:06,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-09 18:32:06,667 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-07-09 18:32:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:06,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161413827] [2021-07-09 18:32:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:06,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:06,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161413827] [2021-07-09 18:32:06,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161413827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:06,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589125904] [2021-07-09 18:32:06,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:06,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:06,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:32:06,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:07,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:07,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:32:07,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:32:07,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:32:07,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:07,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:07,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:32:07,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:32:07,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:32:07,540 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:07,546 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:32:07,553 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:07,560 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:32:07,567 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:32:07,574 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:07,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:07,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:07,578 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,602 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-09 18:32:07,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:07,603 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:32:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:07,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589125904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:07,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:07,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:32:07,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772112978] [2021-07-09 18:32:07,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:32:07,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:32:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:32:07,620 INFO L87 Difference]: Start difference. First operand 1932 states and 6551 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:08,008 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-09 18:32:08,241 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-09 18:32:08,478 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-09 18:32:08,799 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:32:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:09,129 INFO L93 Difference]: Finished difference Result 2505 states and 8099 transitions. [2021-07-09 18:32:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:32:09,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:09,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:09,134 INFO L225 Difference]: With dead ends: 2505 [2021-07-09 18:32:09,134 INFO L226 Difference]: Without dead ends: 2483 [2021-07-09 18:32:09,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1536.6ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:32:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-07-09 18:32:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1948. [2021-07-09 18:32:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.3954802259887007) internal successors, (6611), 1947 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6611 transitions. [2021-07-09 18:32:09,168 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6611 transitions. Word has length 26 [2021-07-09 18:32:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:09,168 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6611 transitions. [2021-07-09 18:32:09,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6611 transitions. [2021-07-09 18:32:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:09,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:09,171 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:09,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:09,389 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:09,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:09,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-07-09 18:32:09,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:09,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10282820] [2021-07-09 18:32:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:09,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:09,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10282820] [2021-07-09 18:32:09,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10282820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:09,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516633797] [2021-07-09 18:32:09,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:09,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:09,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:09,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:32:09,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:10,310 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:32:10,609 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:32:10,779 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_421, v_prenex_422, v_prenex_425], 6=[v_prenex_426, A, v_prenex_420, v_prenex_423, v_prenex_424]} [2021-07-09 18:32:10,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:10,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:32:10,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,229 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-07-09 18:32:11,230 INFO L628 ElimStorePlain]: treesize reduction 307, result has 56.1 percent of original size [2021-07-09 18:32:11,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:11,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:32:11,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,410 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-09 18:32:11,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:11,435 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:32:11,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:32:11,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,598 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:32:11,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:11,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:11,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-09 18:32:11,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,775 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:32:11,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:11,800 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:32:11,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-09 18:32:11,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,937 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:32:11,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:11,956 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:32:11,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-09 18:32:11,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:12,084 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:32:12,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:12,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:12,105 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:32:12,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:32:12,109 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:12,231 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-09 18:32:12,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:12,249 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:32:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:32:12,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:12,371 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-09 18:32:12,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:12,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:32:12,384 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:706, output treesize:429 [2021-07-09 18:32:12,640 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-09 18:32:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:12,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516633797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:12,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:12,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:32:12,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870257029] [2021-07-09 18:32:12,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:32:12,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:12,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:32:12,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:32:12,763 INFO L87 Difference]: Start difference. First operand 1948 states and 6611 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:13,300 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-09 18:32:13,659 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-07-09 18:32:14,195 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-07-09 18:32:14,456 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-09 18:32:15,188 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-07-09 18:32:16,002 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2021-07-09 18:32:16,808 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-07-09 18:32:17,371 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2021-07-09 18:32:18,301 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-07-09 18:32:18,786 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2021-07-09 18:32:19,438 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 101 [2021-07-09 18:32:19,671 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-09 18:32:19,879 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-07-09 18:32:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:20,135 INFO L93 Difference]: Finished difference Result 2657 states and 8685 transitions. [2021-07-09 18:32:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:32:20,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:20,140 INFO L225 Difference]: With dead ends: 2657 [2021-07-09 18:32:20,140 INFO L226 Difference]: Without dead ends: 2642 [2021-07-09 18:32:20,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 7615.5ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:32:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-07-09 18:32:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1952. [2021-07-09 18:32:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 3.3956945156330085) internal successors, (6625), 1951 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 6625 transitions. [2021-07-09 18:32:20,167 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 6625 transitions. Word has length 26 [2021-07-09 18:32:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:20,167 INFO L482 AbstractCegarLoop]: Abstraction has 1952 states and 6625 transitions. [2021-07-09 18:32:20,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 6625 transitions. [2021-07-09 18:32:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:20,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:20,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:20,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3193,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:20,380 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:20,380 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 51 times [2021-07-09 18:32:20,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:20,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642210267] [2021-07-09 18:32:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:20,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:20,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642210267] [2021-07-09 18:32:20,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642210267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:20,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954958051] [2021-07-09 18:32:20,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:20,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:20,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:20,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:21,083 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:32:21,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:21,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:32:21,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:21,257 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:32:21,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:21,272 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:21,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:32:21,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:21,383 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 18:32:21,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:21,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:32:21,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:21,504 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:32:21,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:21,517 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:21,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:32:21,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:21,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:21,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:32:21,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:21,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:21,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:32:21,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:21,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:21,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:32:21,848 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:21,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:21,953 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:21,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:32:21,954 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:22,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:22,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:32:22,050 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:32:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:22,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954958051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:22,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:22,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:32:22,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752194006] [2021-07-09 18:32:22,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:32:22,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:22,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:32:22,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:32:22,238 INFO L87 Difference]: Start difference. First operand 1952 states and 6625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:23,333 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-07-09 18:32:23,603 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:32:23,725 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-09 18:32:24,043 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-07-09 18:32:24,285 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-07-09 18:32:24,494 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 18:32:24,718 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-07-09 18:32:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:24,860 INFO L93 Difference]: Finished difference Result 2972 states and 9683 transitions. [2021-07-09 18:32:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:32:24,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:24,865 INFO L225 Difference]: With dead ends: 2972 [2021-07-09 18:32:24,866 INFO L226 Difference]: Without dead ends: 2942 [2021-07-09 18:32:24,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2710.9ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:32:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-09 18:32:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1949. [2021-07-09 18:32:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.3983572895277208) internal successors, (6620), 1948 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6620 transitions. [2021-07-09 18:32:24,897 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6620 transitions. Word has length 26 [2021-07-09 18:32:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:24,897 INFO L482 AbstractCegarLoop]: Abstraction has 1949 states and 6620 transitions. [2021-07-09 18:32:24,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6620 transitions. [2021-07-09 18:32:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:24,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:24,900 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:25,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-07-09 18:32:25,116 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-07-09 18:32:25,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:25,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199387799] [2021-07-09 18:32:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:25,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199387799] [2021-07-09 18:32:25,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199387799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917919179] [2021-07-09 18:32:25,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:25,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:32:25,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:32:25,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:32:25,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:32:25,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:25,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:32:25,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:32:25,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:25,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:25,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:25,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:26,001 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:26,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:26,008 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:32:26,016 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:26,023 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:26,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:32:26,030 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:26,037 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:26,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:32:26,045 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:26,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:26,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:32:26,049 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:26,072 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:32:26,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:26,074 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:32:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:26,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917919179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:26,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:26,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:32:26,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094107674] [2021-07-09 18:32:26,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:32:26,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:32:26,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:32:26,107 INFO L87 Difference]: Start difference. First operand 1949 states and 6620 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:27,401 INFO L93 Difference]: Finished difference Result 3403 states and 10936 transitions. [2021-07-09 18:32:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:32:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:27,407 INFO L225 Difference]: With dead ends: 3403 [2021-07-09 18:32:27,407 INFO L226 Difference]: Without dead ends: 3373 [2021-07-09 18:32:27,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1361.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:32:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-07-09 18:32:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 2041. [2021-07-09 18:32:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4073529411764705) internal successors, (6951), 2040 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6951 transitions. [2021-07-09 18:32:27,446 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6951 transitions. Word has length 26 [2021-07-09 18:32:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:27,446 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 6951 transitions. [2021-07-09 18:32:27,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6951 transitions. [2021-07-09 18:32:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:27,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:27,450 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:27,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:27,666 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:27,666 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-07-09 18:32:27,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:27,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058851855] [2021-07-09 18:32:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:27,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:27,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058851855] [2021-07-09 18:32:27,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058851855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:27,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159112541] [2021-07-09 18:32:27,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:27,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:32:27,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:28,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,474 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-09 18:32:28,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 41 [2021-07-09 18:32:28,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:28,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-07-09 18:32:28,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,540 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:32:28,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:32:28,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,573 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-09 18:32:28,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-07-09 18:32:28,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,606 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-09 18:32:28,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 28 [2021-07-09 18:32:28,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,626 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:32:28,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:32:28,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,647 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:32:28,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:32:28,648 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:28,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:32:28,688 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,722 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-09 18:32:28,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-07-09 18:32:28,726 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,745 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:32:28,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:32:28,746 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,774 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-09 18:32:28,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 25 [2021-07-09 18:32:28,775 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,803 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-09 18:32:28,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-07-09 18:32:28,804 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,823 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:32:28,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-07-09 18:32:28,824 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,842 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:32:28,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:32:28,843 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,860 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:32:28,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:32:28,861 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:28,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:28,872 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:32:28,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:32:28,873 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:29,058 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-07-09 18:32:29,059 INFO L628 ElimStorePlain]: treesize reduction 193, result has 41.2 percent of original size [2021-07-09 18:32:29,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:32:29,062 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:150 [2021-07-09 18:32:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:29,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159112541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:29,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:29,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:32:29,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063402895] [2021-07-09 18:32:29,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:32:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:32:29,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:32:29,248 INFO L87 Difference]: Start difference. First operand 2041 states and 6951 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:30,639 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-07-09 18:32:31,039 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-09 18:32:31,323 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-07-09 18:32:31,668 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-07-09 18:32:31,844 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-09 18:32:32,157 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-07-09 18:32:32,327 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-07-09 18:32:32,536 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:32:32,659 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-07-09 18:32:32,902 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-07-09 18:32:33,062 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-07-09 18:32:33,240 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:32:33,522 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-07-09 18:32:33,690 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-09 18:32:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:33,870 INFO L93 Difference]: Finished difference Result 3293 states and 10339 transitions. [2021-07-09 18:32:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:32:33,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:33,877 INFO L225 Difference]: With dead ends: 3293 [2021-07-09 18:32:33,877 INFO L226 Difference]: Without dead ends: 3220 [2021-07-09 18:32:33,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4465.7ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:32:33,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-07-09 18:32:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2049. [2021-07-09 18:32:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-07-09 18:32:33,913 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-07-09 18:32:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:33,913 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-07-09 18:32:33,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-07-09 18:32:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:33,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:33,916 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:34,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-07-09 18:32:34,132 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash -272116042, now seen corresponding path program 52 times [2021-07-09 18:32:34,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:34,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428395642] [2021-07-09 18:32:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:34,360 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-07-09 18:32:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:34,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:34,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428395642] [2021-07-09 18:32:34,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428395642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:34,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508156748] [2021-07-09 18:32:34,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:34,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:32:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:34,977 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:32:35,078 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_460, v_prenex_455, v_prenex_457], 6=[A, v_prenex_450, v_prenex_453, v_prenex_444, v_prenex_446]} [2021-07-09 18:32:35,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:35,106 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:32:35,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:32:35,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:35,480 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2021-07-09 18:32:35,480 INFO L628 ElimStorePlain]: treesize reduction 283, result has 56.5 percent of original size [2021-07-09 18:32:35,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:35,506 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:32:35,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:32:35,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:35,652 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-07-09 18:32:35,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:35,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:35,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:35,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:32:35,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:35,965 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2021-07-09 18:32:35,965 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-07-09 18:32:35,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:35,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:35,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:32:35,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:36,272 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 140 [2021-07-09 18:32:36,272 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-07-09 18:32:36,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:36,291 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:32:36,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:32:36,292 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:36,424 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-07-09 18:32:36,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:36,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:36,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:32:36,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:36,578 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:32:36,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:36,602 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:32:36,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:32:36,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:36,729 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:32:36,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:36,751 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:32:36,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:32:36,753 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:36,872 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-09 18:32:36,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:36,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:32:36,890 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:658, output treesize:346 [2021-07-09 18:32:37,110 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-09 18:32:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:37,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508156748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:37,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:37,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:32:37,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073266904] [2021-07-09 18:32:37,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:32:37,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:37,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:32:37,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:32:37,215 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:38,551 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-09 18:32:38,676 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:32:39,113 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-09 18:32:39,352 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:32:39,715 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-07-09 18:32:40,008 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2021-07-09 18:32:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:40,072 INFO L93 Difference]: Finished difference Result 2966 states and 9810 transitions. [2021-07-09 18:32:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:32:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:40,078 INFO L225 Difference]: With dead ends: 2966 [2021-07-09 18:32:40,078 INFO L226 Difference]: Without dead ends: 2951 [2021-07-09 18:32:40,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3227.4ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:32:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-09 18:32:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2061. [2021-07-09 18:32:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-07-09 18:32:40,117 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-07-09 18:32:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:40,117 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-07-09 18:32:40,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-07-09 18:32:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:40,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:40,121 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:40,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:40,337 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 53 times [2021-07-09 18:32:40,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:40,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801490362] [2021-07-09 18:32:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:40,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:40,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801490362] [2021-07-09 18:32:40,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801490362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:40,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949494419] [2021-07-09 18:32:40,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:40,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:32:40,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:40,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:32:40,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:41,225 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-09 18:32:41,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:41,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:32:41,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:41,361 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:41,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:32:41,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:41,492 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:32:41,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:41,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:32:41,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:41,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:41,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:32:41,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:41,644 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:32:41,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:41,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:32:41,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:41,670 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:41,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:32:41,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:41,786 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-09 18:32:41,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:41,800 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:41,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:32:41,802 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:41,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:41,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:32:41,815 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:41,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:41,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:32:41,922 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-07-09 18:32:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:42,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949494419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:42,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:42,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:32:42,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073272108] [2021-07-09 18:32:42,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:32:42,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:32:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:32:42,115 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:42,382 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-07-09 18:32:42,703 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 18:32:42,920 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-09 18:32:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:43,431 INFO L93 Difference]: Finished difference Result 2612 states and 8738 transitions. [2021-07-09 18:32:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:32:43,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:43,436 INFO L225 Difference]: With dead ends: 2612 [2021-07-09 18:32:43,436 INFO L226 Difference]: Without dead ends: 2587 [2021-07-09 18:32:43,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1749.3ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:32:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-07-09 18:32:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2061. [2021-07-09 18:32:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-07-09 18:32:43,467 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-07-09 18:32:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:43,467 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-07-09 18:32:43,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-07-09 18:32:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:43,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:43,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:43,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:43,685 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1086187700, now seen corresponding path program 54 times [2021-07-09 18:32:43,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334741091] [2021-07-09 18:32:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:44,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:44,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334741091] [2021-07-09 18:32:44,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334741091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:44,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987034264] [2021-07-09 18:32:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:44,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:32:44,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:44,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:32:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:44,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:44,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:44,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,351 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:44,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:44,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,360 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:44,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:32:44,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,372 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:44,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:32:44,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:44,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:32:44,386 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:44,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:32:44,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,408 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:44,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:32:44,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:44,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:32:44,428 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,437 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:44,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:32:44,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:44,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:32:44,453 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,463 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:44,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:32:44,464 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:44,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:32:44,478 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,490 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:44,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:32:44,491 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:44,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:32:44,544 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,552 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:44,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:32:44,552 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:44,557 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:44,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:32:44,558 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:44,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:44,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:32:44,626 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:32:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:44,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987034264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:44,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:44,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:32:44,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007755233] [2021-07-09 18:32:44,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:32:44,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:32:44,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:32:44,799 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:46,085 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-09 18:32:46,500 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-09 18:32:46,783 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:32:47,131 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-09 18:32:47,443 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-07-09 18:32:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:47,506 INFO L93 Difference]: Finished difference Result 2664 states and 8880 transitions. [2021-07-09 18:32:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:32:47,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:47,511 INFO L225 Difference]: With dead ends: 2664 [2021-07-09 18:32:47,511 INFO L226 Difference]: Without dead ends: 2649 [2021-07-09 18:32:47,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2780.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:32:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-07-09 18:32:47,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2049. [2021-07-09 18:32:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-07-09 18:32:47,547 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-07-09 18:32:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:47,547 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-07-09 18:32:47,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-07-09 18:32:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:47,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:47,551 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:47,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:47,765 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-07-09 18:32:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:47,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807432358] [2021-07-09 18:32:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:48,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:48,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807432358] [2021-07-09 18:32:48,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807432358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:48,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924190572] [2021-07-09 18:32:48,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:48,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:48,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:48,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:32:48,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:48,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:48,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:48,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:32:48,697 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:32:48,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:32:48,713 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:32:48,722 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:32:48,730 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:32:48,737 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:48,745 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:32:48,753 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:48,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:48,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:32:48,757 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:48,782 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-09 18:32:48,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:48,783 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:32:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:48,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924190572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:48,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:48,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:32:48,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516362403] [2021-07-09 18:32:48,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:32:48,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:32:48,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:32:48,801 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:51,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:51,212 INFO L93 Difference]: Finished difference Result 2625 states and 8625 transitions. [2021-07-09 18:32:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:32:51,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:51,217 INFO L225 Difference]: With dead ends: 2625 [2021-07-09 18:32:51,217 INFO L226 Difference]: Without dead ends: 2603 [2021-07-09 18:32:51,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2429.7ms TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:32:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-09 18:32:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2047. [2021-07-09 18:32:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.40811339198436) internal successors, (6973), 2046 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 6973 transitions. [2021-07-09 18:32:51,254 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 6973 transitions. Word has length 26 [2021-07-09 18:32:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:51,254 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 6973 transitions. [2021-07-09 18:32:51,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 6973 transitions. [2021-07-09 18:32:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:51,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:51,257 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:51,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-07-09 18:32:51,474 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-07-09 18:32:51,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:51,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594329661] [2021-07-09 18:32:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:51,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:51,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594329661] [2021-07-09 18:32:51,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594329661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:51,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608389354] [2021-07-09 18:32:51,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:51,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:51,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:51,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:51,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:52,125 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-09 18:32:52,176 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_470], 6=[v_prenex_472, v_prenex_474]} [2021-07-09 18:32:52,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:32:52,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-07-09 18:32:52,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,329 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-09 18:32:52,329 INFO L628 ElimStorePlain]: treesize reduction 162, result has 46.2 percent of original size [2021-07-09 18:32:52,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:32:52,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:52,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:32:52,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:52,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:32:52,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:52,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:32:52,451 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-07-09 18:32:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:52,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608389354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:52,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:52,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:32:52,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294063810] [2021-07-09 18:32:52,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:32:52,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:32:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:32:52,500 INFO L87 Difference]: Start difference. First operand 2047 states and 6973 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:54,010 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:32:54,284 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 18:32:54,439 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-09 18:32:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:54,573 INFO L93 Difference]: Finished difference Result 2959 states and 9765 transitions. [2021-07-09 18:32:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:32:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:54,579 INFO L225 Difference]: With dead ends: 2959 [2021-07-09 18:32:54,580 INFO L226 Difference]: Without dead ends: 2919 [2021-07-09 18:32:54,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2067.4ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:32:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-07-09 18:32:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2063. [2021-07-09 18:32:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.41270611057226) internal successors, (7037), 2062 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7037 transitions. [2021-07-09 18:32:54,646 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7037 transitions. Word has length 26 [2021-07-09 18:32:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:54,646 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7037 transitions. [2021-07-09 18:32:54,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7037 transitions. [2021-07-09 18:32:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:54,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:54,649 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:54,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:54,866 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:54,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-07-09 18:32:54,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:54,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795833371] [2021-07-09 18:32:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:55,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:55,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795833371] [2021-07-09 18:32:55,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795833371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:55,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902543220] [2021-07-09 18:32:55,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:55,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:55,518 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-09 18:32:55,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:55,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:55,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 51 [2021-07-09 18:32:55,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:55,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:55,756 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-09 18:32:55,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 39 [2021-07-09 18:32:55,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:56,914 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2021-07-09 18:32:56,915 INFO L628 ElimStorePlain]: treesize reduction 42, result has 95.5 percent of original size [2021-07-09 18:32:56,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:56,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:56,972 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-07-09 18:32:56,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:32:56,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,027 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-09 18:32:57,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 47 [2021-07-09 18:32:57,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,220 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 188 DAG size of output: 183 [2021-07-09 18:32:58,220 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.4 percent of original size [2021-07-09 18:32:58,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,268 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-09 18:32:58,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:32:58,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,313 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-09 18:32:58,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:32:58,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:59,420 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2021-07-09 18:32:59,420 INFO L628 ElimStorePlain]: treesize reduction 44, result has 94.9 percent of original size [2021-07-09 18:32:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:59,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:59,467 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-07-09 18:32:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:32:59,469 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:59,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:59,508 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-07-09 18:32:59,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:32:59,510 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:00,017 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-09 18:33:00,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:00,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:00,068 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-09 18:33:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 39 [2021-07-09 18:33:00,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:00,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:00,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:00,116 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-09 18:33:00,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-07-09 18:33:00,121 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,048 WARN L205 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2021-07-09 18:33:01,048 INFO L628 ElimStorePlain]: treesize reduction 18, result has 97.7 percent of original size [2021-07-09 18:33:01,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,102 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-09 18:33:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:33:01,109 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:01,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-09 18:33:01,151 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,607 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-09 18:33:01,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:01,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,650 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-09 18:33:01,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:33:01,652 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,686 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-09 18:33:01,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:33:01,687 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:02,426 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-07-09 18:33:02,426 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.4 percent of original size [2021-07-09 18:33:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:02,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:02,476 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-07-09 18:33:02,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 43 [2021-07-09 18:33:02,480 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:02,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:02,524 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-09 18:33:02,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 36 [2021-07-09 18:33:02,528 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:02,923 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:33:02,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:02,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-09 18:33:02,970 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:945, output treesize:1467 [2021-07-09 18:33:03,458 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-07-09 18:33:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:03,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902543220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:03,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:03,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:33:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38068914] [2021-07-09 18:33:03,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:33:03,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:33:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:33:03,559 INFO L87 Difference]: Start difference. First operand 2063 states and 7037 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:04,146 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2021-07-09 18:33:04,370 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2021-07-09 18:33:04,685 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-07-09 18:33:05,090 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-09 18:33:05,264 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-07-09 18:33:05,582 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-07-09 18:33:05,937 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 18:33:06,142 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-09 18:33:06,316 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-07-09 18:33:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:06,385 INFO L93 Difference]: Finished difference Result 2842 states and 9205 transitions. [2021-07-09 18:33:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:33:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:06,391 INFO L225 Difference]: With dead ends: 2842 [2021-07-09 18:33:06,391 INFO L226 Difference]: Without dead ends: 2798 [2021-07-09 18:33:06,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3431.6ms TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:33:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-07-09 18:33:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2136. [2021-07-09 18:33:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.406088992974239) internal successors, (7272), 2135 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7272 transitions. [2021-07-09 18:33:06,430 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7272 transitions. Word has length 26 [2021-07-09 18:33:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:06,430 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 7272 transitions. [2021-07-09 18:33:06,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7272 transitions. [2021-07-09 18:33:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:06,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:06,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:06,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:06,649 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash -550813574, now seen corresponding path program 55 times [2021-07-09 18:33:06,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:06,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424821248] [2021-07-09 18:33:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:06,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:06,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424821248] [2021-07-09 18:33:06,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424821248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:06,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838658132] [2021-07-09 18:33:06,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:07,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:33:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:07,445 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-09 18:33:07,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:07,552 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:33:07,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:33:07,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:07,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:07,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:07,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 18:33:07,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:07,884 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 147 [2021-07-09 18:33:07,884 INFO L628 ElimStorePlain]: treesize reduction 194, result has 64.3 percent of original size [2021-07-09 18:33:07,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:07,913 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:33:07,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:33:07,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,056 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-07-09 18:33:08,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,081 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:33:08,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:33:08,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,216 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-07-09 18:33:08,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,243 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:33:08,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:33:08,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,376 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-07-09 18:33:08,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,401 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:33:08,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:33:08,405 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,538 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 18:33:08,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,561 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:33:08,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:33:08,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,690 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 18:33:08,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:33:08,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,959 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-07-09 18:33:08,960 INFO L628 ElimStorePlain]: treesize reduction 12, result has 95.8 percent of original size [2021-07-09 18:33:08,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:33:08,983 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:09,246 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-07-09 18:33:09,246 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-07-09 18:33:09,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:33:09,264 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:583, output treesize:253 [2021-07-09 18:33:09,459 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 18:33:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:09,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838658132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:09,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:09,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:33:09,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989355748] [2021-07-09 18:33:09,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:33:09,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:33:09,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:09,558 INFO L87 Difference]: Start difference. First operand 2136 states and 7272 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:09,775 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 20 [2021-07-09 18:33:10,652 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-09 18:33:10,915 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-09 18:33:11,143 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-09 18:33:11,361 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 18:33:11,797 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-07-09 18:33:12,137 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-09 18:33:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:12,193 INFO L93 Difference]: Finished difference Result 3051 states and 10102 transitions. [2021-07-09 18:33:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:33:12,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:12,199 INFO L225 Difference]: With dead ends: 3051 [2021-07-09 18:33:12,200 INFO L226 Difference]: Without dead ends: 3036 [2021-07-09 18:33:12,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 3018.4ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:33:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-07-09 18:33:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2138. [2021-07-09 18:33:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.402433317735143) internal successors, (7271), 2137 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7271 transitions. [2021-07-09 18:33:12,238 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7271 transitions. Word has length 26 [2021-07-09 18:33:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:12,238 INFO L482 AbstractCegarLoop]: Abstraction has 2138 states and 7271 transitions. [2021-07-09 18:33:12,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7271 transitions. [2021-07-09 18:33:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:12,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:12,242 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:12,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3761,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:12,457 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 56 times [2021-07-09 18:33:12,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:12,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453902804] [2021-07-09 18:33:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:12,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453902804] [2021-07-09 18:33:12,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453902804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76347283] [2021-07-09 18:33:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:12,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:12,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:12,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:33:12,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,125 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:13,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:13,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,134 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:13,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:13,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,142 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:13,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:13,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,155 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:13,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:33:13,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:13,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:33:13,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,181 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:33:13,183 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,192 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:13,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:13,193 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:33:13,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,215 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:13,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:33:13,216 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:33:13,231 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,240 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:13,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:33:13,241 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:13,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:33:13,255 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,266 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:13,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:33:13,268 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:13,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:33:13,282 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:13,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:33:13,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:13,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:13,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:33:13,301 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:13,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:13,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:33:13,377 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:33:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76347283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:13,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:13,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:33:13,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900111530] [2021-07-09 18:33:13,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:33:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:33:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:33:13,613 INFO L87 Difference]: Start difference. First operand 2138 states and 7271 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:13,914 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-09 18:33:14,732 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 18:33:14,908 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:33:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:14,983 INFO L93 Difference]: Finished difference Result 2900 states and 9631 transitions. [2021-07-09 18:33:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:33:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:14,987 INFO L225 Difference]: With dead ends: 2900 [2021-07-09 18:33:14,987 INFO L226 Difference]: Without dead ends: 2875 [2021-07-09 18:33:14,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1684.6ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:33:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-07-09 18:33:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2131. [2021-07-09 18:33:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.3995305164319247) internal successors, (7241), 2130 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7241 transitions. [2021-07-09 18:33:15,015 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7241 transitions. Word has length 26 [2021-07-09 18:33:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:15,016 INFO L482 AbstractCegarLoop]: Abstraction has 2131 states and 7241 transitions. [2021-07-09 18:33:15,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7241 transitions. [2021-07-09 18:33:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:15,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:15,018 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:15,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:15,234 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:15,234 INFO L82 PathProgramCache]: Analyzing trace with hash 807490168, now seen corresponding path program 57 times [2021-07-09 18:33:15,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:15,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413055132] [2021-07-09 18:33:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:15,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:15,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413055132] [2021-07-09 18:33:15,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413055132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:15,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387986972] [2021-07-09 18:33:15,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:15,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:33:15,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:33:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:16,178 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-09 18:33:16,517 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2021-07-09 18:33:16,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:16,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:16,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:16,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:16,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:16,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:16,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:16,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:16,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:16,826 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-09 18:33:16,826 INFO L628 ElimStorePlain]: treesize reduction 143, result has 51.5 percent of original size [2021-07-09 18:33:16,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:16,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:33:16,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:16,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:16,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:16,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:16,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:16,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:16,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:16,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:16,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:16,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:16,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:16,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:16,969 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:17,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:17,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:33:17,020 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:333, output treesize:51 [2021-07-09 18:33:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:17,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387986972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:17,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:17,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:33:17,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488454023] [2021-07-09 18:33:17,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:33:17,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:17,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:33:17,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:17,074 INFO L87 Difference]: Start difference. First operand 2131 states and 7241 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:17,826 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-07-09 18:33:18,205 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 18:33:18,640 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-07-09 18:33:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:18,757 INFO L93 Difference]: Finished difference Result 2671 states and 8927 transitions. [2021-07-09 18:33:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:33:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:18,763 INFO L225 Difference]: With dead ends: 2671 [2021-07-09 18:33:18,763 INFO L226 Difference]: Without dead ends: 2656 [2021-07-09 18:33:18,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2298.6ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:33:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-07-09 18:33:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2119. [2021-07-09 18:33:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.4022662889518416) internal successors, (7206), 2118 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7206 transitions. [2021-07-09 18:33:18,794 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7206 transitions. Word has length 26 [2021-07-09 18:33:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:18,794 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7206 transitions. [2021-07-09 18:33:18,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7206 transitions. [2021-07-09 18:33:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:18,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:18,797 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:19,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-07-09 18:33:19,011 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-07-09 18:33:19,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:19,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521483930] [2021-07-09 18:33:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:19,212 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-07-09 18:33:19,342 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-07-09 18:33:19,521 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-09 18:33:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:19,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521483930] [2021-07-09 18:33:19,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521483930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115613894] [2021-07-09 18:33:19,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:19,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:19,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:19,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:33:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:19,994 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-09 18:33:20,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:20,101 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:20,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:33:20,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:20,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:20,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:33:20,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:20,231 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:33:20,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:20,244 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:20,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:33:20,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:20,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:33:20,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:20,360 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:33:20,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:20,373 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:20,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:33:20,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:20,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:20,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:33:20,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:20,505 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:33:20,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:20,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:33:20,520 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:20,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:20,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:33:20,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:20,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:20,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:33:20,638 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-07-09 18:33:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:20,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115613894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:20,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:20,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:33:20,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119908460] [2021-07-09 18:33:20,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:33:20,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:20,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:33:20,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:20,832 INFO L87 Difference]: Start difference. First operand 2119 states and 7206 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:21,907 INFO L93 Difference]: Finished difference Result 2740 states and 9175 transitions. [2021-07-09 18:33:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:33:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:21,913 INFO L225 Difference]: With dead ends: 2740 [2021-07-09 18:33:21,913 INFO L226 Difference]: Without dead ends: 2725 [2021-07-09 18:33:21,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1639.6ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:33:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-07-09 18:33:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2113. [2021-07-09 18:33:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.403409090909091) internal successors, (7188), 2112 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7188 transitions. [2021-07-09 18:33:21,947 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7188 transitions. Word has length 26 [2021-07-09 18:33:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:21,947 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 7188 transitions. [2021-07-09 18:33:21,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7188 transitions. [2021-07-09 18:33:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:21,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:21,950 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:22,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-07-09 18:33:22,165 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:22,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1128807410, now seen corresponding path program 64 times [2021-07-09 18:33:22,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:22,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817954953] [2021-07-09 18:33:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:22,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:22,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817954953] [2021-07-09 18:33:22,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817954953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:22,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784457609] [2021-07-09 18:33:22,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:22,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:22,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:22,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:22,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:22,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:33:22,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:22,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:33:22,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:22,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:22,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:33:22,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:22,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:22,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:33:22,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:22,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:22,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:22,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:33:22,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:33:23,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:33:23,013 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:33:23,020 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:33:23,028 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:33:23,035 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:33:23,042 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:33:23,049 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:33:23,057 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:33:23,064 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:23,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:23,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:33:23,068 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:23,093 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-09 18:33:23,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:23,094 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:33:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:23,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784457609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:23,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:23,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:33:23,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313992599] [2021-07-09 18:33:23,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:33:23,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:23,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:33:23,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:23,129 INFO L87 Difference]: Start difference. First operand 2113 states and 7188 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:24,626 INFO L93 Difference]: Finished difference Result 2992 states and 9892 transitions. [2021-07-09 18:33:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:33:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:24,632 INFO L225 Difference]: With dead ends: 2992 [2021-07-09 18:33:24,632 INFO L226 Difference]: Without dead ends: 2955 [2021-07-09 18:33:24,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1513.5ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:33:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-07-09 18:33:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2104. [2021-07-09 18:33:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.4013314312886354) internal successors, (7153), 2103 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7153 transitions. [2021-07-09 18:33:24,673 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7153 transitions. Word has length 26 [2021-07-09 18:33:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:24,673 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 7153 transitions. [2021-07-09 18:33:24,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7153 transitions. [2021-07-09 18:33:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:24,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:24,676 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:24,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3871,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:24,893 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-07-09 18:33:24,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:24,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455653350] [2021-07-09 18:33:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:24,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:24,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455653350] [2021-07-09 18:33:24,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455653350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:24,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983254487] [2021-07-09 18:33:24,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:24,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:33:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:25,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983254487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:25,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:25,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:33:25,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871625957] [2021-07-09 18:33:25,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:33:25,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:25,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:33:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:33:25,052 INFO L87 Difference]: Start difference. First operand 2104 states and 7153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:26,000 INFO L93 Difference]: Finished difference Result 5069 states and 15729 transitions. [2021-07-09 18:33:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:33:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:26,011 INFO L225 Difference]: With dead ends: 5069 [2021-07-09 18:33:26,011 INFO L226 Difference]: Without dead ends: 5069 [2021-07-09 18:33:26,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:33:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-07-09 18:33:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 2297. [2021-07-09 18:33:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.451219512195122) internal successors, (7924), 2296 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7924 transitions. [2021-07-09 18:33:26,068 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7924 transitions. Word has length 28 [2021-07-09 18:33:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:26,068 INFO L482 AbstractCegarLoop]: Abstraction has 2297 states and 7924 transitions. [2021-07-09 18:33:26,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7924 transitions. [2021-07-09 18:33:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:26,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:26,072 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:26,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:26,278 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:26,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-07-09 18:33:26,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:26,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417953978] [2021-07-09 18:33:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:26,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:26,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417953978] [2021-07-09 18:33:26,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417953978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:26,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521774839] [2021-07-09 18:33:26,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:26,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:33:26,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:26,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521774839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:26,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:26,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:33:26,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758517564] [2021-07-09 18:33:26,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:33:26,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:26,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:33:26,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:33:26,451 INFO L87 Difference]: Start difference. First operand 2297 states and 7924 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:27,609 INFO L93 Difference]: Finished difference Result 6700 states and 20456 transitions. [2021-07-09 18:33:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:33:27,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:27,624 INFO L225 Difference]: With dead ends: 6700 [2021-07-09 18:33:27,624 INFO L226 Difference]: Without dead ends: 6700 [2021-07-09 18:33:27,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 689.0ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:33:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-07-09 18:33:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 2308. [2021-07-09 18:33:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.4581707845687037) internal successors, (7978), 2307 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 7978 transitions. [2021-07-09 18:33:27,702 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 7978 transitions. Word has length 28 [2021-07-09 18:33:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:27,702 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 7978 transitions. [2021-07-09 18:33:27,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 7978 transitions. [2021-07-09 18:33:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:27,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:27,707 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:27,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:27,921 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-07-09 18:33:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:27,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139189641] [2021-07-09 18:33:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:27,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:27,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139189641] [2021-07-09 18:33:27,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139189641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:27,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152219739] [2021-07-09 18:33:27,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:27,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:28,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152219739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:28,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:28,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:33:28,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929401220] [2021-07-09 18:33:28,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:33:28,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:33:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:33:28,090 INFO L87 Difference]: Start difference. First operand 2308 states and 7978 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:29,219 INFO L93 Difference]: Finished difference Result 6089 states and 18976 transitions. [2021-07-09 18:33:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:33:29,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:29,232 INFO L225 Difference]: With dead ends: 6089 [2021-07-09 18:33:29,232 INFO L226 Difference]: Without dead ends: 6089 [2021-07-09 18:33:29,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:33:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2021-07-09 18:33:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 2256. [2021-07-09 18:33:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.4350332594235033) internal successors, (7746), 2255 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7746 transitions. [2021-07-09 18:33:29,300 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7746 transitions. Word has length 28 [2021-07-09 18:33:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:29,300 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 7746 transitions. [2021-07-09 18:33:29,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7746 transitions. [2021-07-09 18:33:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:29,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:29,304 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:29,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-07-09 18:33:29,521 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-07-09 18:33:29,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:29,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491913677] [2021-07-09 18:33:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:29,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491913677] [2021-07-09 18:33:29,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491913677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360738525] [2021-07-09 18:33:29,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:29,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:29,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:29,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:29,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360738525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:29,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:29,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:33:29,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239153778] [2021-07-09 18:33:29,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:33:29,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:29,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:33:29,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:33:29,668 INFO L87 Difference]: Start difference. First operand 2256 states and 7746 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:30,648 INFO L93 Difference]: Finished difference Result 5162 states and 15913 transitions. [2021-07-09 18:33:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:33:30,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:30,658 INFO L225 Difference]: With dead ends: 5162 [2021-07-09 18:33:30,658 INFO L226 Difference]: Without dead ends: 5162 [2021-07-09 18:33:30,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:33:30,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-07-09 18:33:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 2269. [2021-07-09 18:33:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 3.432980599647266) internal successors, (7786), 2268 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 7786 transitions. [2021-07-09 18:33:30,737 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 7786 transitions. Word has length 28 [2021-07-09 18:33:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:30,738 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 7786 transitions. [2021-07-09 18:33:30,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 7786 transitions. [2021-07-09 18:33:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:30,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:30,741 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:30,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:30,957 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:30,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 65 times [2021-07-09 18:33:30,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:30,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785366741] [2021-07-09 18:33:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:30,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:30,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785366741] [2021-07-09 18:33:30,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785366741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:30,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370412705] [2021-07-09 18:33:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:31,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:33:31,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:31,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:31,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370412705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:31,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:31,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:33:31,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712443805] [2021-07-09 18:33:31,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:33:31,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:31,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:33:31,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:31,112 INFO L87 Difference]: Start difference. First operand 2269 states and 7786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:31,738 INFO L93 Difference]: Finished difference Result 4589 states and 14330 transitions. [2021-07-09 18:33:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:33:31,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:31,747 INFO L225 Difference]: With dead ends: 4589 [2021-07-09 18:33:31,747 INFO L226 Difference]: Without dead ends: 4589 [2021-07-09 18:33:31,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:33:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-07-09 18:33:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2339. [2021-07-09 18:33:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.417023096663815) internal successors, (7989), 2338 states have internal predecessors, (7989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7989 transitions. [2021-07-09 18:33:31,800 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7989 transitions. Word has length 28 [2021-07-09 18:33:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:31,801 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 7989 transitions. [2021-07-09 18:33:31,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7989 transitions. [2021-07-09 18:33:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:31,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:31,804 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:32,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3965 [2021-07-09 18:33:32,020 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-07-09 18:33:32,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:32,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280090538] [2021-07-09 18:33:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:32,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:32,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280090538] [2021-07-09 18:33:32,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280090538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:32,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291343347] [2021-07-09 18:33:32,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:32,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:33:32,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:32,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:32,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:32,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291343347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:32,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:32,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:33:32,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502416435] [2021-07-09 18:33:32,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:33:32,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:33:32,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:33:32,144 INFO L87 Difference]: Start difference. First operand 2339 states and 7989 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:32,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:32,318 INFO L93 Difference]: Finished difference Result 3853 states and 12551 transitions. [2021-07-09 18:33:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:33:32,319 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:32,325 INFO L225 Difference]: With dead ends: 3853 [2021-07-09 18:33:32,325 INFO L226 Difference]: Without dead ends: 3829 [2021-07-09 18:33:32,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:33:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-07-09 18:33:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 2701. [2021-07-09 18:33:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 3.4851851851851854) internal successors, (9410), 2700 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 9410 transitions. [2021-07-09 18:33:32,364 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 9410 transitions. Word has length 28 [2021-07-09 18:33:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:32,365 INFO L482 AbstractCegarLoop]: Abstraction has 2701 states and 9410 transitions. [2021-07-09 18:33:32,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 9410 transitions. [2021-07-09 18:33:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:32,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:32,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:32,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3966 [2021-07-09 18:33:32,585 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-07-09 18:33:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:32,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545396190] [2021-07-09 18:33:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:32,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:32,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545396190] [2021-07-09 18:33:32,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545396190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:32,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889761731] [2021-07-09 18:33:32,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:32,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:32,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:32,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:33:32,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:32,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889761731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:32,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:32,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:33:32,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748215963] [2021-07-09 18:33:32,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:33:32,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:32,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:33:32,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:33:32,712 INFO L87 Difference]: Start difference. First operand 2701 states and 9410 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:33,373 INFO L93 Difference]: Finished difference Result 4524 states and 14456 transitions. [2021-07-09 18:33:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:33:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:33,382 INFO L225 Difference]: With dead ends: 4524 [2021-07-09 18:33:33,382 INFO L226 Difference]: Without dead ends: 4477 [2021-07-09 18:33:33,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:33:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2021-07-09 18:33:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2866. [2021-07-09 18:33:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 3.505759162303665) internal successors, (10044), 2865 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 10044 transitions. [2021-07-09 18:33:33,442 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 10044 transitions. Word has length 28 [2021-07-09 18:33:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:33,442 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 10044 transitions. [2021-07-09 18:33:33,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 10044 transitions. [2021-07-09 18:33:33,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:33,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:33,447 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:33,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3967 [2021-07-09 18:33:33,663 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-07-09 18:33:33,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:33,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265170347] [2021-07-09 18:33:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:33,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:33,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265170347] [2021-07-09 18:33:33,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265170347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:33,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72139914] [2021-07-09 18:33:33,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:33,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:33:33,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:33:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:33,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72139914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:33,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:33,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:33:33,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999080871] [2021-07-09 18:33:33,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:33:33,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:33,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:33:33,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:33,802 INFO L87 Difference]: Start difference. First operand 2866 states and 10044 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:34,554 INFO L93 Difference]: Finished difference Result 4809 states and 15088 transitions. [2021-07-09 18:33:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:33:34,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:34,565 INFO L225 Difference]: With dead ends: 4809 [2021-07-09 18:33:34,565 INFO L226 Difference]: Without dead ends: 4783 [2021-07-09 18:33:34,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:33:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-07-09 18:33:34,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2887. [2021-07-09 18:33:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.512127512127512) internal successors, (10136), 2886 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10136 transitions. [2021-07-09 18:33:34,628 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10136 transitions. Word has length 28 [2021-07-09 18:33:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:34,628 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10136 transitions. [2021-07-09 18:33:34,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10136 transitions. [2021-07-09 18:33:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:34,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:34,633 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:34,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3968,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:34,849 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-07-09 18:33:34,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:34,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956598233] [2021-07-09 18:33:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:34,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:34,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956598233] [2021-07-09 18:33:34,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956598233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:34,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263156179] [2021-07-09 18:33:34,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:34,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:33:34,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:33:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:35,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263156179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:35,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:35,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:33:35,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311819141] [2021-07-09 18:33:35,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:33:35,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:35,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:33:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:35,019 INFO L87 Difference]: Start difference. First operand 2887 states and 10136 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:35,657 INFO L93 Difference]: Finished difference Result 4801 states and 15088 transitions. [2021-07-09 18:33:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:33:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:35,667 INFO L225 Difference]: With dead ends: 4801 [2021-07-09 18:33:35,668 INFO L226 Difference]: Without dead ends: 4786 [2021-07-09 18:33:35,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:33:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-07-09 18:33:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2887. [2021-07-09 18:33:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.5076230076230077) internal successors, (10123), 2886 states have internal predecessors, (10123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10123 transitions. [2021-07-09 18:33:35,735 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10123 transitions. Word has length 28 [2021-07-09 18:33:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:35,735 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10123 transitions. [2021-07-09 18:33:35,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10123 transitions. [2021-07-09 18:33:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:35,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:35,740 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:35,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-07-09 18:33:35,957 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:35,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-07-09 18:33:35,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:35,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669177496] [2021-07-09 18:33:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:35,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:35,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669177496] [2021-07-09 18:33:35,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669177496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:35,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045710141] [2021-07-09 18:33:35,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:36,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:33:36,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:36,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045710141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:36,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:36,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:33:36,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935702388] [2021-07-09 18:33:36,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:36,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:36,079 INFO L87 Difference]: Start difference. First operand 2887 states and 10123 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:36,589 INFO L93 Difference]: Finished difference Result 5555 states and 17807 transitions. [2021-07-09 18:33:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:33:36,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:36,601 INFO L225 Difference]: With dead ends: 5555 [2021-07-09 18:33:36,601 INFO L226 Difference]: Without dead ends: 5508 [2021-07-09 18:33:36,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:33:36,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-07-09 18:33:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3028. [2021-07-09 18:33:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 3.5500495540138752) internal successors, (10746), 3027 states have internal predecessors, (10746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 10746 transitions. [2021-07-09 18:33:36,710 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 10746 transitions. Word has length 28 [2021-07-09 18:33:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:36,710 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 10746 transitions. [2021-07-09 18:33:36,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 10746 transitions. [2021-07-09 18:33:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:36,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:36,715 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:36,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:36,932 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:36,932 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-07-09 18:33:36,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:36,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194806413] [2021-07-09 18:33:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:36,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:36,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194806413] [2021-07-09 18:33:36,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194806413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:36,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894420486] [2021-07-09 18:33:36,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:36,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:36,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:36,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:37,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894420486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:37,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:37,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:33:37,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711683508] [2021-07-09 18:33:37,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:33:37,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:37,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:33:37,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:33:37,035 INFO L87 Difference]: Start difference. First operand 3028 states and 10746 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:37,186 INFO L93 Difference]: Finished difference Result 4339 states and 14289 transitions. [2021-07-09 18:33:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:33:37,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:37,195 INFO L225 Difference]: With dead ends: 4339 [2021-07-09 18:33:37,195 INFO L226 Difference]: Without dead ends: 4339 [2021-07-09 18:33:37,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:33:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-07-09 18:33:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 2863. [2021-07-09 18:33:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 3.5195667365478687) internal successors, (10073), 2862 states have internal predecessors, (10073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 10073 transitions. [2021-07-09 18:33:37,254 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 10073 transitions. Word has length 28 [2021-07-09 18:33:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:37,254 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 10073 transitions. [2021-07-09 18:33:37,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 10073 transitions. [2021-07-09 18:33:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:37,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:37,259 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:37,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:37,476 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:37,476 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-07-09 18:33:37,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:37,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457013966] [2021-07-09 18:33:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:37,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:37,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457013966] [2021-07-09 18:33:37,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457013966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:37,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489529630] [2021-07-09 18:33:37,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:37,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:33:37,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:37,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:37,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489529630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:37,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:37,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:33:37,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986930567] [2021-07-09 18:33:37,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:37,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:37,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:37,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:37,600 INFO L87 Difference]: Start difference. First operand 2863 states and 10073 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:38,240 INFO L93 Difference]: Finished difference Result 6209 states and 19661 transitions. [2021-07-09 18:33:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:33:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:38,254 INFO L225 Difference]: With dead ends: 6209 [2021-07-09 18:33:38,255 INFO L226 Difference]: Without dead ends: 6209 [2021-07-09 18:33:38,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:33:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-07-09 18:33:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 2881. [2021-07-09 18:33:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.5194444444444444) internal successors, (10136), 2880 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10136 transitions. [2021-07-09 18:33:38,338 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10136 transitions. Word has length 28 [2021-07-09 18:33:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:38,338 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10136 transitions. [2021-07-09 18:33:38,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10136 transitions. [2021-07-09 18:33:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:38,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:38,343 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:38,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:38,560 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-07-09 18:33:38,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:38,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876964997] [2021-07-09 18:33:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:38,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876964997] [2021-07-09 18:33:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876964997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611567613] [2021-07-09 18:33:38,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:38,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:38,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:38,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:38,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:38,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611567613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:38,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:38,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:33:38,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578718931] [2021-07-09 18:33:38,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:38,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:38,726 INFO L87 Difference]: Start difference. First operand 2881 states and 10136 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:39,581 INFO L93 Difference]: Finished difference Result 6471 states and 20458 transitions. [2021-07-09 18:33:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:33:39,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:39,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:39,596 INFO L225 Difference]: With dead ends: 6471 [2021-07-09 18:33:39,596 INFO L226 Difference]: Without dead ends: 6471 [2021-07-09 18:33:39,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:33:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-07-09 18:33:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 2975. [2021-07-09 18:33:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.511432414256893) internal successors, (10443), 2974 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10443 transitions. [2021-07-09 18:33:39,691 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10443 transitions. Word has length 28 [2021-07-09 18:33:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:39,691 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 10443 transitions. [2021-07-09 18:33:39,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10443 transitions. [2021-07-09 18:33:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:39,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:39,696 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:39,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:39,913 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:39,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-07-09 18:33:39,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:39,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328524019] [2021-07-09 18:33:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:39,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:39,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328524019] [2021-07-09 18:33:39,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328524019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:39,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816634442] [2021-07-09 18:33:39,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:39,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:33:39,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:33:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:40,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816634442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:40,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:40,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:33:40,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143779041] [2021-07-09 18:33:40,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:40,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:40,062 INFO L87 Difference]: Start difference. First operand 2975 states and 10443 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:40,776 INFO L93 Difference]: Finished difference Result 6662 states and 21078 transitions. [2021-07-09 18:33:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:33:40,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:40,792 INFO L225 Difference]: With dead ends: 6662 [2021-07-09 18:33:40,793 INFO L226 Difference]: Without dead ends: 6626 [2021-07-09 18:33:40,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:33:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-07-09 18:33:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 3377. [2021-07-09 18:33:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.5390995260663507) internal successors, (11948), 3376 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 11948 transitions. [2021-07-09 18:33:40,914 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 11948 transitions. Word has length 28 [2021-07-09 18:33:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:40,914 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 11948 transitions. [2021-07-09 18:33:40,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 11948 transitions. [2021-07-09 18:33:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:40,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:40,920 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:41,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:41,137 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-07-09 18:33:41,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:41,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722712376] [2021-07-09 18:33:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:41,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:41,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722712376] [2021-07-09 18:33:41,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722712376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:41,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639284183] [2021-07-09 18:33:41,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:41,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:33:41,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:33:41,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:41,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639284183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:41,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:41,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:33:41,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257415857] [2021-07-09 18:33:41,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:41,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:41,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:41,273 INFO L87 Difference]: Start difference. First operand 3377 states and 11948 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:41,937 INFO L93 Difference]: Finished difference Result 6820 states and 21509 transitions. [2021-07-09 18:33:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:33:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:41,953 INFO L225 Difference]: With dead ends: 6820 [2021-07-09 18:33:41,953 INFO L226 Difference]: Without dead ends: 6820 [2021-07-09 18:33:41,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:33:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6820 states. [2021-07-09 18:33:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6820 to 3088. [2021-07-09 18:33:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 3.498542274052478) internal successors, (10800), 3087 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 10800 transitions. [2021-07-09 18:33:42,050 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 10800 transitions. Word has length 28 [2021-07-09 18:33:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:42,050 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 10800 transitions. [2021-07-09 18:33:42,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 10800 transitions. [2021-07-09 18:33:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:42,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:42,056 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:42,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3975 [2021-07-09 18:33:42,272 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:42,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-07-09 18:33:42,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:42,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360576196] [2021-07-09 18:33:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:42,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:42,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360576196] [2021-07-09 18:33:42,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360576196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:42,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161155449] [2021-07-09 18:33:42,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:42,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:42,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:42,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161155449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:42,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:42,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:33:42,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134882502] [2021-07-09 18:33:42,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:42,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:42,395 INFO L87 Difference]: Start difference. First operand 3088 states and 10800 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:43,168 INFO L93 Difference]: Finished difference Result 5973 states and 19224 transitions. [2021-07-09 18:33:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:33:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:43,180 INFO L225 Difference]: With dead ends: 5973 [2021-07-09 18:33:43,180 INFO L226 Difference]: Without dead ends: 5969 [2021-07-09 18:33:43,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:33:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-07-09 18:33:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 2848. [2021-07-09 18:33:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 3.523709167544784) internal successors, (10032), 2847 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 10032 transitions. [2021-07-09 18:33:43,257 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 10032 transitions. Word has length 28 [2021-07-09 18:33:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:43,258 INFO L482 AbstractCegarLoop]: Abstraction has 2848 states and 10032 transitions. [2021-07-09 18:33:43,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 10032 transitions. [2021-07-09 18:33:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:43,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:43,262 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:43,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:43,479 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:43,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:43,479 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-07-09 18:33:43,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:43,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310138813] [2021-07-09 18:33:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:43,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:43,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310138813] [2021-07-09 18:33:43,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310138813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:43,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662020651] [2021-07-09 18:33:43,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:43,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:43,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:43,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:43,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662020651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:43,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:43,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:33:43,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088875014] [2021-07-09 18:33:43,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:33:43,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:33:43,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:43,635 INFO L87 Difference]: Start difference. First operand 2848 states and 10032 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:44,752 INFO L93 Difference]: Finished difference Result 9218 states and 30019 transitions. [2021-07-09 18:33:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:33:44,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:44,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:44,775 INFO L225 Difference]: With dead ends: 9218 [2021-07-09 18:33:44,775 INFO L226 Difference]: Without dead ends: 9218 [2021-07-09 18:33:44,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 632.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:33:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-07-09 18:33:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 3024. [2021-07-09 18:33:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3023 states have (on average 3.595765795567317) internal successors, (10870), 3023 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 10870 transitions. [2021-07-09 18:33:44,899 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 10870 transitions. Word has length 28 [2021-07-09 18:33:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:44,899 INFO L482 AbstractCegarLoop]: Abstraction has 3024 states and 10870 transitions. [2021-07-09 18:33:44,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 10870 transitions. [2021-07-09 18:33:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:44,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:44,905 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:45,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3977 [2021-07-09 18:33:45,121 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-07-09 18:33:45,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:45,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889605489] [2021-07-09 18:33:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:45,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:45,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889605489] [2021-07-09 18:33:45,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889605489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:45,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459248806] [2021-07-09 18:33:45,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:45,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:33:45,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:45,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459248806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:45,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:45,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:33:45,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510319501] [2021-07-09 18:33:45,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:33:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:45,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:33:45,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:45,273 INFO L87 Difference]: Start difference. First operand 3024 states and 10870 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:46,251 INFO L93 Difference]: Finished difference Result 9047 states and 29554 transitions. [2021-07-09 18:33:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:33:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:46,268 INFO L225 Difference]: With dead ends: 9047 [2021-07-09 18:33:46,268 INFO L226 Difference]: Without dead ends: 9047 [2021-07-09 18:33:46,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:33:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-07-09 18:33:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 2996. [2021-07-09 18:33:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2995 states have (on average 3.579632721202003) internal successors, (10721), 2995 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 10721 transitions. [2021-07-09 18:33:46,361 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 10721 transitions. Word has length 28 [2021-07-09 18:33:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:46,362 INFO L482 AbstractCegarLoop]: Abstraction has 2996 states and 10721 transitions. [2021-07-09 18:33:46,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 10721 transitions. [2021-07-09 18:33:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:46,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:46,366 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:46,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3978,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:46,582 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-07-09 18:33:46,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:46,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811276985] [2021-07-09 18:33:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:46,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:46,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811276985] [2021-07-09 18:33:46,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811276985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:46,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322272898] [2021-07-09 18:33:46,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:46,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:46,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:46,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322272898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:46,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:46,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:33:46,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095882477] [2021-07-09 18:33:46,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:33:46,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:33:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:33:46,760 INFO L87 Difference]: Start difference. First operand 2996 states and 10721 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:47,820 INFO L93 Difference]: Finished difference Result 8494 states and 26829 transitions. [2021-07-09 18:33:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:33:47,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:47,840 INFO L225 Difference]: With dead ends: 8494 [2021-07-09 18:33:47,840 INFO L226 Difference]: Without dead ends: 8494 [2021-07-09 18:33:47,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:33:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2021-07-09 18:33:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 3016. [2021-07-09 18:33:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 3.5830845771144277) internal successors, (10803), 3015 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 10803 transitions. [2021-07-09 18:33:47,939 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 10803 transitions. Word has length 28 [2021-07-09 18:33:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:47,939 INFO L482 AbstractCegarLoop]: Abstraction has 3016 states and 10803 transitions. [2021-07-09 18:33:47,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 10803 transitions. [2021-07-09 18:33:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:47,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:47,944 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:48,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3979 [2021-07-09 18:33:48,160 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:48,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-07-09 18:33:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:48,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733036406] [2021-07-09 18:33:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:48,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:48,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733036406] [2021-07-09 18:33:48,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733036406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:48,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459068373] [2021-07-09 18:33:48,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:48,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:33:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:48,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459068373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:48,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:48,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:33:48,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534920913] [2021-07-09 18:33:48,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:33:48,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:33:48,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:33:48,292 INFO L87 Difference]: Start difference. First operand 3016 states and 10803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:49,249 INFO L93 Difference]: Finished difference Result 8003 states and 25641 transitions. [2021-07-09 18:33:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:33:49,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:49,272 INFO L225 Difference]: With dead ends: 8003 [2021-07-09 18:33:49,272 INFO L226 Difference]: Without dead ends: 7995 [2021-07-09 18:33:49,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:33:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-07-09 18:33:49,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 2998. [2021-07-09 18:33:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.578912245578912) internal successors, (10726), 2997 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 10726 transitions. [2021-07-09 18:33:49,374 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 10726 transitions. Word has length 28 [2021-07-09 18:33:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:49,374 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 10726 transitions. [2021-07-09 18:33:49,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 10726 transitions. [2021-07-09 18:33:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:49,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:49,379 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:49,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-07-09 18:33:49,595 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:49,595 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-07-09 18:33:49,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:49,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186402216] [2021-07-09 18:33:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:49,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:49,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186402216] [2021-07-09 18:33:49,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186402216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:49,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774162830] [2021-07-09 18:33:49,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:49,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:33:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:49,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:49,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774162830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:49,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:49,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:33:49,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477348822] [2021-07-09 18:33:49,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:33:49,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:33:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:49,745 INFO L87 Difference]: Start difference. First operand 2998 states and 10726 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:50,824 INFO L93 Difference]: Finished difference Result 7921 states and 25395 transitions. [2021-07-09 18:33:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:33:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:50,846 INFO L225 Difference]: With dead ends: 7921 [2021-07-09 18:33:50,846 INFO L226 Difference]: Without dead ends: 7921 [2021-07-09 18:33:50,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:33:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-07-09 18:33:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 3014. [2021-07-09 18:33:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5811483571191505) internal successors, (10790), 3013 states have internal predecessors, (10790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10790 transitions. [2021-07-09 18:33:50,944 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10790 transitions. Word has length 28 [2021-07-09 18:33:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:50,944 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10790 transitions. [2021-07-09 18:33:50,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10790 transitions. [2021-07-09 18:33:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:50,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:50,949 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:51,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:51,165 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:51,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:51,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-07-09 18:33:51,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:51,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028898535] [2021-07-09 18:33:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:51,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:51,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028898535] [2021-07-09 18:33:51,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028898535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:51,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832787140] [2021-07-09 18:33:51,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:51,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832787140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:51,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:51,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:33:51,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548104731] [2021-07-09 18:33:51,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:33:51,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:51,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:33:51,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:51,302 INFO L87 Difference]: Start difference. First operand 3014 states and 10790 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:52,336 INFO L93 Difference]: Finished difference Result 7589 states and 24611 transitions. [2021-07-09 18:33:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:33:52,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:52,355 INFO L225 Difference]: With dead ends: 7589 [2021-07-09 18:33:52,355 INFO L226 Difference]: Without dead ends: 7581 [2021-07-09 18:33:52,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 545.6ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:33:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-07-09 18:33:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 2771. [2021-07-09 18:33:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 3.4974729241877256) internal successors, (9688), 2770 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 9688 transitions. [2021-07-09 18:33:52,475 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 9688 transitions. Word has length 28 [2021-07-09 18:33:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:52,475 INFO L482 AbstractCegarLoop]: Abstraction has 2771 states and 9688 transitions. [2021-07-09 18:33:52,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 9688 transitions. [2021-07-09 18:33:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:52,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:52,480 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:52,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3982 [2021-07-09 18:33:52,693 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:52,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-07-09 18:33:52,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:52,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244995670] [2021-07-09 18:33:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:52,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244995670] [2021-07-09 18:33:52,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244995670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8154414] [2021-07-09 18:33:52,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:52,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:52,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:52,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8154414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:52,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:52,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:33:52,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509138106] [2021-07-09 18:33:52,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:33:52,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:52,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:33:52,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:52,839 INFO L87 Difference]: Start difference. First operand 2771 states and 9688 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:53,773 INFO L93 Difference]: Finished difference Result 5790 states and 18502 transitions. [2021-07-09 18:33:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:33:53,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:53,786 INFO L225 Difference]: With dead ends: 5790 [2021-07-09 18:33:53,786 INFO L226 Difference]: Without dead ends: 5790 [2021-07-09 18:33:53,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:33:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2021-07-09 18:33:53,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 2783. [2021-07-09 18:33:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.4960460100647017) internal successors, (9726), 2782 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 9726 transitions. [2021-07-09 18:33:53,858 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 9726 transitions. Word has length 28 [2021-07-09 18:33:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:53,858 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 9726 transitions. [2021-07-09 18:33:53,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 9726 transitions. [2021-07-09 18:33:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:53,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:53,863 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:54,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:54,079 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:54,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-07-09 18:33:54,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:54,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859521561] [2021-07-09 18:33:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:54,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859521561] [2021-07-09 18:33:54,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859521561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651052068] [2021-07-09 18:33:54,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:54,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:33:54,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:54,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:54,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651052068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:54,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:54,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:33:54,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363455150] [2021-07-09 18:33:54,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:33:54,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:54,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:33:54,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:33:54,230 INFO L87 Difference]: Start difference. First operand 2783 states and 9726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:55,213 INFO L93 Difference]: Finished difference Result 6569 states and 20497 transitions. [2021-07-09 18:33:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:33:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:55,227 INFO L225 Difference]: With dead ends: 6569 [2021-07-09 18:33:55,227 INFO L226 Difference]: Without dead ends: 6569 [2021-07-09 18:33:55,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 624.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:33:55,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-07-09 18:33:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 2849. [2021-07-09 18:33:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.4912219101123596) internal successors, (9943), 2848 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9943 transitions. [2021-07-09 18:33:55,298 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9943 transitions. Word has length 28 [2021-07-09 18:33:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:55,298 INFO L482 AbstractCegarLoop]: Abstraction has 2849 states and 9943 transitions. [2021-07-09 18:33:55,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9943 transitions. [2021-07-09 18:33:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:55,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:55,302 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:55,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:55,518 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:55,519 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-07-09 18:33:55,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:55,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517650898] [2021-07-09 18:33:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:55,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:55,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517650898] [2021-07-09 18:33:55,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517650898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:55,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303744627] [2021-07-09 18:33:55,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:55,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:55,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:55,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:55,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303744627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:55,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:55,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:33:55,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331131763] [2021-07-09 18:33:55,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:33:55,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:55,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:33:55,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:33:55,662 INFO L87 Difference]: Start difference. First operand 2849 states and 9943 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:56,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:56,727 INFO L93 Difference]: Finished difference Result 6132 states and 19351 transitions. [2021-07-09 18:33:56,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:33:56,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:56,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:56,740 INFO L225 Difference]: With dead ends: 6132 [2021-07-09 18:33:56,740 INFO L226 Difference]: Without dead ends: 6128 [2021-07-09 18:33:56,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 654.3ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:33:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-07-09 18:33:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 2775. [2021-07-09 18:33:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4870223503965394) internal successors, (9673), 2774 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9673 transitions. [2021-07-09 18:33:56,821 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9673 transitions. Word has length 28 [2021-07-09 18:33:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:56,821 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9673 transitions. [2021-07-09 18:33:56,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9673 transitions. [2021-07-09 18:33:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:56,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:56,826 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:57,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:57,041 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 66 times [2021-07-09 18:33:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:57,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366350675] [2021-07-09 18:33:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:57,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:57,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366350675] [2021-07-09 18:33:57,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366350675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932988550] [2021-07-09 18:33:57,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:57,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:33:57,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:57,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:57,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:57,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932988550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:57,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:33:57,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814610697] [2021-07-09 18:33:57,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:33:57,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:57,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:33:57,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:33:57,211 INFO L87 Difference]: Start difference. First operand 2775 states and 9673 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:57,806 INFO L93 Difference]: Finished difference Result 5268 states and 16907 transitions. [2021-07-09 18:33:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:33:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:57,816 INFO L225 Difference]: With dead ends: 5268 [2021-07-09 18:33:57,816 INFO L226 Difference]: Without dead ends: 5268 [2021-07-09 18:33:57,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:33:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-07-09 18:33:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 2775. [2021-07-09 18:33:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4891852919971162) internal successors, (9679), 2774 states have internal predecessors, (9679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9679 transitions. [2021-07-09 18:33:57,875 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9679 transitions. Word has length 28 [2021-07-09 18:33:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:57,875 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9679 transitions. [2021-07-09 18:33:57,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9679 transitions. [2021-07-09 18:33:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:57,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:57,879 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:58,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:58,095 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:58,095 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 67 times [2021-07-09 18:33:58,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:58,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928396406] [2021-07-09 18:33:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:58,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:58,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928396406] [2021-07-09 18:33:58,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928396406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:58,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720194247] [2021-07-09 18:33:58,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:58,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:58,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:58,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720194247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:58,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:58,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:33:58,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788185730] [2021-07-09 18:33:58,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:33:58,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:58,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:33:58,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:33:58,266 INFO L87 Difference]: Start difference. First operand 2775 states and 9679 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:58,992 INFO L93 Difference]: Finished difference Result 5584 states and 17812 transitions. [2021-07-09 18:33:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:33:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:33:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:59,003 INFO L225 Difference]: With dead ends: 5584 [2021-07-09 18:33:59,003 INFO L226 Difference]: Without dead ends: 5584 [2021-07-09 18:33:59,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:33:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-07-09 18:33:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 2766. [2021-07-09 18:33:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 3.489330922242315) internal successors, (9648), 2765 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 9648 transitions. [2021-07-09 18:33:59,063 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 9648 transitions. Word has length 28 [2021-07-09 18:33:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:59,063 INFO L482 AbstractCegarLoop]: Abstraction has 2766 states and 9648 transitions. [2021-07-09 18:33:59,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 9648 transitions. [2021-07-09 18:33:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:33:59,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:59,067 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:59,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3987 [2021-07-09 18:33:59,281 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 68 times [2021-07-09 18:33:59,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:59,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697084596] [2021-07-09 18:33:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:59,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:59,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697084596] [2021-07-09 18:33:59,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697084596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:59,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585701567] [2021-07-09 18:33:59,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:59,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:59,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:59,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:33:59,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:59,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585701567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:59,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:59,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:33:59,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569463097] [2021-07-09 18:33:59,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:33:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:33:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:33:59,447 INFO L87 Difference]: Start difference. First operand 2766 states and 9648 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:00,218 INFO L93 Difference]: Finished difference Result 6079 states and 19142 transitions. [2021-07-09 18:34:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:34:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:00,230 INFO L225 Difference]: With dead ends: 6079 [2021-07-09 18:34:00,230 INFO L226 Difference]: Without dead ends: 6079 [2021-07-09 18:34:00,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:34:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2021-07-09 18:34:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 2826. [2021-07-09 18:34:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 3.485309734513274) internal successors, (9846), 2825 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 9846 transitions. [2021-07-09 18:34:00,302 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 9846 transitions. Word has length 28 [2021-07-09 18:34:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:00,302 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 9846 transitions. [2021-07-09 18:34:00,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 9846 transitions. [2021-07-09 18:34:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:00,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:00,307 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:00,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:00,511 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:00,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:00,511 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 69 times [2021-07-09 18:34:00,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:00,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264558481] [2021-07-09 18:34:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:00,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:00,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264558481] [2021-07-09 18:34:00,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264558481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:00,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896482722] [2021-07-09 18:34:00,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:00,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:34:00,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:00,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:00,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896482722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:00,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:00,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:34:00,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344021370] [2021-07-09 18:34:00,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:00,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:00,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:00,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:00,653 INFO L87 Difference]: Start difference. First operand 2826 states and 9846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:01,213 INFO L93 Difference]: Finished difference Result 6807 states and 22904 transitions. [2021-07-09 18:34:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:34:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:01,227 INFO L225 Difference]: With dead ends: 6807 [2021-07-09 18:34:01,228 INFO L226 Difference]: Without dead ends: 6807 [2021-07-09 18:34:01,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:34:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2021-07-09 18:34:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 4024. [2021-07-09 18:34:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 3.6109868257519264) internal successors, (14527), 4023 states have internal predecessors, (14527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 14527 transitions. [2021-07-09 18:34:01,320 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 14527 transitions. Word has length 28 [2021-07-09 18:34:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:01,320 INFO L482 AbstractCegarLoop]: Abstraction has 4024 states and 14527 transitions. [2021-07-09 18:34:01,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 14527 transitions. [2021-07-09 18:34:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:01,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:01,327 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:01,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-07-09 18:34:01,541 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 70 times [2021-07-09 18:34:01,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:01,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787712456] [2021-07-09 18:34:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:01,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:01,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787712456] [2021-07-09 18:34:01,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787712456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:01,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482200812] [2021-07-09 18:34:01,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:01,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:01,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:01,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:01,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:01,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482200812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:01,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:01,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:34:01,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970050551] [2021-07-09 18:34:01,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:01,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:01,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:01,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:01,700 INFO L87 Difference]: Start difference. First operand 4024 states and 14527 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:02,494 INFO L93 Difference]: Finished difference Result 7353 states and 24861 transitions. [2021-07-09 18:34:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:34:02,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:02,510 INFO L225 Difference]: With dead ends: 7353 [2021-07-09 18:34:02,510 INFO L226 Difference]: Without dead ends: 7349 [2021-07-09 18:34:02,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:34:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-07-09 18:34:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 3916. [2021-07-09 18:34:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 3.6206896551724137) internal successors, (14175), 3915 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 14175 transitions. [2021-07-09 18:34:02,597 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 14175 transitions. Word has length 28 [2021-07-09 18:34:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:02,597 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 14175 transitions. [2021-07-09 18:34:02,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 14175 transitions. [2021-07-09 18:34:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:02,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:02,603 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:02,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-07-09 18:34:02,817 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:02,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-07-09 18:34:02,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:02,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212732763] [2021-07-09 18:34:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:02,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:02,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212732763] [2021-07-09 18:34:02,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212732763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:02,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249239452] [2021-07-09 18:34:02,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:02,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:02,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:02,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249239452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:02,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:02,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:34:02,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660973306] [2021-07-09 18:34:02,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:02,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:02,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:02,943 INFO L87 Difference]: Start difference. First operand 3916 states and 14175 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:03,905 INFO L93 Difference]: Finished difference Result 8141 states and 27286 transitions. [2021-07-09 18:34:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:34:03,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:03,920 INFO L225 Difference]: With dead ends: 8141 [2021-07-09 18:34:03,921 INFO L226 Difference]: Without dead ends: 8132 [2021-07-09 18:34:03,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:34:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-07-09 18:34:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 4360. [2021-07-09 18:34:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 3.7118605184675384) internal successors, (16180), 4359 states have internal predecessors, (16180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 16180 transitions. [2021-07-09 18:34:04,022 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 16180 transitions. Word has length 28 [2021-07-09 18:34:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:04,022 INFO L482 AbstractCegarLoop]: Abstraction has 4360 states and 16180 transitions. [2021-07-09 18:34:04,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 16180 transitions. [2021-07-09 18:34:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:04,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:04,029 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:04,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-07-09 18:34:04,244 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:04,244 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-07-09 18:34:04,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:04,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12050118] [2021-07-09 18:34:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:04,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:04,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12050118] [2021-07-09 18:34:04,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12050118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:04,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171558408] [2021-07-09 18:34:04,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:04,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:04,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171558408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:04,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:04,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:34:04,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459904203] [2021-07-09 18:34:04,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:04,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:04,386 INFO L87 Difference]: Start difference. First operand 4360 states and 16180 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:05,199 INFO L93 Difference]: Finished difference Result 8418 states and 28143 transitions. [2021-07-09 18:34:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:34:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:05,216 INFO L225 Difference]: With dead ends: 8418 [2021-07-09 18:34:05,216 INFO L226 Difference]: Without dead ends: 8418 [2021-07-09 18:34:05,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:34:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-07-09 18:34:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 4380. [2021-07-09 18:34:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.69901804064855) internal successors, (16198), 4379 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 16198 transitions. [2021-07-09 18:34:05,319 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 16198 transitions. Word has length 28 [2021-07-09 18:34:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:05,319 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 16198 transitions. [2021-07-09 18:34:05,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 16198 transitions. [2021-07-09 18:34:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:05,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:05,326 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:05,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:05,542 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-07-09 18:34:05,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:05,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760802689] [2021-07-09 18:34:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:05,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:05,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760802689] [2021-07-09 18:34:05,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760802689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:05,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656005077] [2021-07-09 18:34:05,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:05,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:05,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656005077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:05,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:05,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:34:05,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163115368] [2021-07-09 18:34:05,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:05,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:05,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:05,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:05,679 INFO L87 Difference]: Start difference. First operand 4380 states and 16198 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:06,162 INFO L93 Difference]: Finished difference Result 7845 states and 27662 transitions. [2021-07-09 18:34:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:34:06,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:06,180 INFO L225 Difference]: With dead ends: 7845 [2021-07-09 18:34:06,180 INFO L226 Difference]: Without dead ends: 7762 [2021-07-09 18:34:06,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:34:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-07-09 18:34:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 5838. [2021-07-09 18:34:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.7627205756381703) internal successors, (21963), 5837 states have internal predecessors, (21963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 21963 transitions. [2021-07-09 18:34:06,297 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 21963 transitions. Word has length 28 [2021-07-09 18:34:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:06,297 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 21963 transitions. [2021-07-09 18:34:06,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 21963 transitions. [2021-07-09 18:34:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:06,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:06,307 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:06,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:06,521 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:06,521 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-07-09 18:34:06,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:06,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872727955] [2021-07-09 18:34:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:06,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872727955] [2021-07-09 18:34:06,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872727955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059730342] [2021-07-09 18:34:06,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:06,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:06,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059730342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:06,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:06,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:34:06,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343120549] [2021-07-09 18:34:06,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:34:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:34:06,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:34:06,621 INFO L87 Difference]: Start difference. First operand 5838 states and 21963 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:06,805 INFO L93 Difference]: Finished difference Result 8103 states and 28515 transitions. [2021-07-09 18:34:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:34:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:06,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:06,823 INFO L225 Difference]: With dead ends: 8103 [2021-07-09 18:34:06,824 INFO L226 Difference]: Without dead ends: 8103 [2021-07-09 18:34:06,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2021-07-09 18:34:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5980. [2021-07-09 18:34:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.7395885599598597) internal successors, (22359), 5979 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 22359 transitions. [2021-07-09 18:34:06,940 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 22359 transitions. Word has length 28 [2021-07-09 18:34:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:06,940 INFO L482 AbstractCegarLoop]: Abstraction has 5980 states and 22359 transitions. [2021-07-09 18:34:06,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 22359 transitions. [2021-07-09 18:34:06,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:06,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:06,949 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:07,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:07,149 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-07-09 18:34:07,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:07,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119287791] [2021-07-09 18:34:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:07,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:07,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119287791] [2021-07-09 18:34:07,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119287791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94145098] [2021-07-09 18:34:07,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:07,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:34:07,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:07,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:07,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94145098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:07,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:34:07,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068391937] [2021-07-09 18:34:07,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:07,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:07,284 INFO L87 Difference]: Start difference. First operand 5980 states and 22359 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:08,084 INFO L93 Difference]: Finished difference Result 12480 states and 43435 transitions. [2021-07-09 18:34:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:34:08,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:08,111 INFO L225 Difference]: With dead ends: 12480 [2021-07-09 18:34:08,112 INFO L226 Difference]: Without dead ends: 12480 [2021-07-09 18:34:08,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:34:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12480 states. [2021-07-09 18:34:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12480 to 6653. [2021-07-09 18:34:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6652 states have (on average 3.753607937462417) internal successors, (24969), 6652 states have internal predecessors, (24969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 24969 transitions. [2021-07-09 18:34:08,288 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 24969 transitions. Word has length 28 [2021-07-09 18:34:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:08,288 INFO L482 AbstractCegarLoop]: Abstraction has 6653 states and 24969 transitions. [2021-07-09 18:34:08,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 24969 transitions. [2021-07-09 18:34:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:08,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:08,300 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:08,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:08,513 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-07-09 18:34:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:08,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531896201] [2021-07-09 18:34:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:08,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:08,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531896201] [2021-07-09 18:34:08,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531896201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:08,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799008090] [2021-07-09 18:34:08,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:08,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:08,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:08,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:08,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:08,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799008090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:08,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:08,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:34:08,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592695471] [2021-07-09 18:34:08,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:08,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:08,621 INFO L87 Difference]: Start difference. First operand 6653 states and 24969 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:09,317 INFO L93 Difference]: Finished difference Result 12633 states and 43998 transitions. [2021-07-09 18:34:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:34:09,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:09,346 INFO L225 Difference]: With dead ends: 12633 [2021-07-09 18:34:09,346 INFO L226 Difference]: Without dead ends: 12633 [2021-07-09 18:34:09,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:34:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12633 states. [2021-07-09 18:34:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12633 to 6881. [2021-07-09 18:34:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6880 states have (on average 3.734156976744186) internal successors, (25691), 6880 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 25691 transitions. [2021-07-09 18:34:09,590 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 25691 transitions. Word has length 28 [2021-07-09 18:34:09,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:09,590 INFO L482 AbstractCegarLoop]: Abstraction has 6881 states and 25691 transitions. [2021-07-09 18:34:09,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:09,590 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 25691 transitions. [2021-07-09 18:34:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:09,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:09,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:09,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-07-09 18:34:09,813 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-07-09 18:34:09,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:09,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296492565] [2021-07-09 18:34:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:09,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296492565] [2021-07-09 18:34:09,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296492565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226374175] [2021-07-09 18:34:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:09,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:34:09,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226374175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:09,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:09,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171428607] [2021-07-09 18:34:09,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:09,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:09,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:09,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:09,913 INFO L87 Difference]: Start difference. First operand 6881 states and 25691 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:10,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:10,236 INFO L93 Difference]: Finished difference Result 9357 states and 33618 transitions. [2021-07-09 18:34:10,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:34:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:10,257 INFO L225 Difference]: With dead ends: 9357 [2021-07-09 18:34:10,257 INFO L226 Difference]: Without dead ends: 9327 [2021-07-09 18:34:10,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:34:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-07-09 18:34:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 7728. [2021-07-09 18:34:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7728 states, 7727 states have (on average 3.760450368836547) internal successors, (29057), 7727 states have internal predecessors, (29057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7728 states to 7728 states and 29057 transitions. [2021-07-09 18:34:10,424 INFO L78 Accepts]: Start accepts. Automaton has 7728 states and 29057 transitions. Word has length 28 [2021-07-09 18:34:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:10,424 INFO L482 AbstractCegarLoop]: Abstraction has 7728 states and 29057 transitions. [2021-07-09 18:34:10,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7728 states and 29057 transitions. [2021-07-09 18:34:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:10,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:10,437 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:10,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:10,653 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-07-09 18:34:10,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:10,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144591646] [2021-07-09 18:34:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:10,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:10,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144591646] [2021-07-09 18:34:10,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144591646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:10,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414820713] [2021-07-09 18:34:10,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:10,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:34:10,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:10,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:10,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:10,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414820713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:10,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:10,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:10,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141388865] [2021-07-09 18:34:10,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:10,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:10,765 INFO L87 Difference]: Start difference. First operand 7728 states and 29057 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:11,157 INFO L93 Difference]: Finished difference Result 9961 states and 35609 transitions. [2021-07-09 18:34:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:34:11,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:11,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:11,177 INFO L225 Difference]: With dead ends: 9961 [2021-07-09 18:34:11,177 INFO L226 Difference]: Without dead ends: 9961 [2021-07-09 18:34:11,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:34:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-07-09 18:34:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7768. [2021-07-09 18:34:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7768 states, 7767 states have (on average 3.756405304493369) internal successors, (29176), 7767 states have internal predecessors, (29176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7768 states to 7768 states and 29176 transitions. [2021-07-09 18:34:11,414 INFO L78 Accepts]: Start accepts. Automaton has 7768 states and 29176 transitions. Word has length 28 [2021-07-09 18:34:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:11,414 INFO L482 AbstractCegarLoop]: Abstraction has 7768 states and 29176 transitions. [2021-07-09 18:34:11,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 7768 states and 29176 transitions. [2021-07-09 18:34:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:11,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:11,427 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:11,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3998 [2021-07-09 18:34:11,644 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-07-09 18:34:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:11,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055911363] [2021-07-09 18:34:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:11,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055911363] [2021-07-09 18:34:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055911363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33495700] [2021-07-09 18:34:11,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:11,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:11,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33495700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:11,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:34:11,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761128192] [2021-07-09 18:34:11,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:11,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:11,747 INFO L87 Difference]: Start difference. First operand 7768 states and 29176 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:12,392 INFO L93 Difference]: Finished difference Result 13358 states and 47391 transitions. [2021-07-09 18:34:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:34:12,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:12,427 INFO L225 Difference]: With dead ends: 13358 [2021-07-09 18:34:12,427 INFO L226 Difference]: Without dead ends: 13354 [2021-07-09 18:34:12,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:34:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13354 states. [2021-07-09 18:34:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13354 to 7674. [2021-07-09 18:34:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.760328424345106) internal successors, (28853), 7673 states have internal predecessors, (28853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 28853 transitions. [2021-07-09 18:34:12,628 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 28853 transitions. Word has length 28 [2021-07-09 18:34:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:12,628 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 28853 transitions. [2021-07-09 18:34:12,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 28853 transitions. [2021-07-09 18:34:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:12,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:12,640 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:12,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3999,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:12,856 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-07-09 18:34:12,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:12,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175118989] [2021-07-09 18:34:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:12,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:12,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175118989] [2021-07-09 18:34:12,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175118989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:12,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937289364] [2021-07-09 18:34:12,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:12,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:12,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:12,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:13,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937289364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:13,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:13,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:34:13,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117796821] [2021-07-09 18:34:13,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:13,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:13,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:13,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:13,065 INFO L87 Difference]: Start difference. First operand 7674 states and 28853 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:13,517 INFO L93 Difference]: Finished difference Result 10180 states and 36418 transitions. [2021-07-09 18:34:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:34:13,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:13,542 INFO L225 Difference]: With dead ends: 10180 [2021-07-09 18:34:13,542 INFO L226 Difference]: Without dead ends: 10180 [2021-07-09 18:34:13,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:34:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10180 states. [2021-07-09 18:34:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10180 to 7620. [2021-07-09 18:34:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7531172069825436) internal successors, (28595), 7619 states have internal predecessors, (28595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28595 transitions. [2021-07-09 18:34:13,711 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28595 transitions. Word has length 28 [2021-07-09 18:34:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:13,711 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28595 transitions. [2021-07-09 18:34:13,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28595 transitions. [2021-07-09 18:34:13,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:13,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:13,723 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:13,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-07-09 18:34:13,939 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:13,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-07-09 18:34:13,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:13,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829643786] [2021-07-09 18:34:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:13,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:13,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829643786] [2021-07-09 18:34:13,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829643786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:13,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229528063] [2021-07-09 18:34:13,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:14,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:34:14,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:14,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:14,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:14,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229528063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:14,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:14,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:34:14,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696602380] [2021-07-09 18:34:14,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:14,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:14,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:14,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:14,065 INFO L87 Difference]: Start difference. First operand 7620 states and 28595 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:14,665 INFO L93 Difference]: Finished difference Result 13241 states and 46888 transitions. [2021-07-09 18:34:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:34:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:14,698 INFO L225 Difference]: With dead ends: 13241 [2021-07-09 18:34:14,698 INFO L226 Difference]: Without dead ends: 13229 [2021-07-09 18:34:14,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:34:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-07-09 18:34:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 7620. [2021-07-09 18:34:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7520672004200026) internal successors, (28587), 7619 states have internal predecessors, (28587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28587 transitions. [2021-07-09 18:34:14,965 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28587 transitions. Word has length 28 [2021-07-09 18:34:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:14,965 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28587 transitions. [2021-07-09 18:34:14,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28587 transitions. [2021-07-09 18:34:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:14,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:14,978 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:15,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-07-09 18:34:15,191 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:15,192 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-07-09 18:34:15,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:15,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910166010] [2021-07-09 18:34:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:15,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:15,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910166010] [2021-07-09 18:34:15,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910166010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:15,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461078565] [2021-07-09 18:34:15,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:15,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:15,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:15,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:15,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:15,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461078565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:15,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:15,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:34:15,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428777585] [2021-07-09 18:34:15,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:15,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:15,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:15,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:15,332 INFO L87 Difference]: Start difference. First operand 7620 states and 28587 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:16,546 INFO L93 Difference]: Finished difference Result 20083 states and 70057 transitions. [2021-07-09 18:34:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:34:16,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:16,591 INFO L225 Difference]: With dead ends: 20083 [2021-07-09 18:34:16,591 INFO L226 Difference]: Without dead ends: 20083 [2021-07-09 18:34:16,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 732.9ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:34:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20083 states. [2021-07-09 18:34:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20083 to 10419. [2021-07-09 18:34:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10418 states have (on average 3.7977538875023997) internal successors, (39565), 10418 states have internal predecessors, (39565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 39565 transitions. [2021-07-09 18:34:16,971 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 39565 transitions. Word has length 28 [2021-07-09 18:34:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:16,971 INFO L482 AbstractCegarLoop]: Abstraction has 10419 states and 39565 transitions. [2021-07-09 18:34:16,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 39565 transitions. [2021-07-09 18:34:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:16,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:16,988 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:17,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-07-09 18:34:17,204 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:17,204 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-07-09 18:34:17,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:17,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059205937] [2021-07-09 18:34:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:17,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:17,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059205937] [2021-07-09 18:34:17,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059205937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116840791] [2021-07-09 18:34:17,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:17,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:34:17,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:17,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:17,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116840791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:17,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:34:17,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768077019] [2021-07-09 18:34:17,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:17,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:17,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:17,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:17,329 INFO L87 Difference]: Start difference. First operand 10419 states and 39565 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:18,449 INFO L93 Difference]: Finished difference Result 19333 states and 68102 transitions. [2021-07-09 18:34:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:34:18,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:18,497 INFO L225 Difference]: With dead ends: 19333 [2021-07-09 18:34:18,497 INFO L226 Difference]: Without dead ends: 19321 [2021-07-09 18:34:18,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 648.5ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:34:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19321 states. [2021-07-09 18:34:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19321 to 10233. [2021-07-09 18:34:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10233 states, 10232 states have (on average 3.8045347928068804) internal successors, (38928), 10232 states have internal predecessors, (38928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 38928 transitions. [2021-07-09 18:34:18,850 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 38928 transitions. Word has length 28 [2021-07-09 18:34:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:18,850 INFO L482 AbstractCegarLoop]: Abstraction has 10233 states and 38928 transitions. [2021-07-09 18:34:18,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 38928 transitions. [2021-07-09 18:34:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:18,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:18,867 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:19,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:19,083 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-07-09 18:34:19,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:19,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455769618] [2021-07-09 18:34:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:19,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:19,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455769618] [2021-07-09 18:34:19,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455769618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:19,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165424687] [2021-07-09 18:34:19,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:19,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:34:19,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:19,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:19,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165424687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:19,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:19,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:34:19,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218533381] [2021-07-09 18:34:19,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:19,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:19,214 INFO L87 Difference]: Start difference. First operand 10233 states and 38928 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:20,291 INFO L93 Difference]: Finished difference Result 19147 states and 67441 transitions. [2021-07-09 18:34:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:34:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:20,343 INFO L225 Difference]: With dead ends: 19147 [2021-07-09 18:34:20,343 INFO L226 Difference]: Without dead ends: 19111 [2021-07-09 18:34:20,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:34:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19111 states. [2021-07-09 18:34:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19111 to 10277. [2021-07-09 18:34:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.802646944336318) internal successors, (39076), 10276 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39076 transitions. [2021-07-09 18:34:20,753 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39076 transitions. Word has length 28 [2021-07-09 18:34:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:20,753 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 39076 transitions. [2021-07-09 18:34:20,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39076 transitions. [2021-07-09 18:34:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:20,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:20,770 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:20,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:20,985 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-07-09 18:34:20,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:20,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330480750] [2021-07-09 18:34:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:21,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:21,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330480750] [2021-07-09 18:34:21,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330480750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091097457] [2021-07-09 18:34:21,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:21,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:21,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:21,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091097457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:21,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:21,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:34:21,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127430007] [2021-07-09 18:34:21,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:21,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:21,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:21,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:21,149 INFO L87 Difference]: Start difference. First operand 10277 states and 39076 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:22,634 INFO L93 Difference]: Finished difference Result 19074 states and 67295 transitions. [2021-07-09 18:34:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:34:22,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:22,676 INFO L225 Difference]: With dead ends: 19074 [2021-07-09 18:34:22,677 INFO L226 Difference]: Without dead ends: 19074 [2021-07-09 18:34:22,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:34:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19074 states. [2021-07-09 18:34:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19074 to 10473. [2021-07-09 18:34:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10473 states, 10472 states have (on average 3.793544690603514) internal successors, (39726), 10472 states have internal predecessors, (39726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10473 states to 10473 states and 39726 transitions. [2021-07-09 18:34:23,028 INFO L78 Accepts]: Start accepts. Automaton has 10473 states and 39726 transitions. Word has length 28 [2021-07-09 18:34:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:23,029 INFO L482 AbstractCegarLoop]: Abstraction has 10473 states and 39726 transitions. [2021-07-09 18:34:23,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 10473 states and 39726 transitions. [2021-07-09 18:34:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:23,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:23,047 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:23,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:23,263 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:23,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-07-09 18:34:23,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:23,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146481150] [2021-07-09 18:34:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:23,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146481150] [2021-07-09 18:34:23,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146481150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505615997] [2021-07-09 18:34:23,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:23,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:23,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:23,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505615997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:23,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:23,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:34:23,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275417472] [2021-07-09 18:34:23,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:23,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:23,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:23,399 INFO L87 Difference]: Start difference. First operand 10473 states and 39726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:24,519 INFO L93 Difference]: Finished difference Result 18684 states and 66217 transitions. [2021-07-09 18:34:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:34:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:24,564 INFO L225 Difference]: With dead ends: 18684 [2021-07-09 18:34:24,565 INFO L226 Difference]: Without dead ends: 18672 [2021-07-09 18:34:24,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:34:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18672 states. [2021-07-09 18:34:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18672 to 10355. [2021-07-09 18:34:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10355 states, 10354 states have (on average 3.7980490631639947) internal successors, (39325), 10354 states have internal predecessors, (39325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 39325 transitions. [2021-07-09 18:34:24,949 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 39325 transitions. Word has length 28 [2021-07-09 18:34:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:24,949 INFO L482 AbstractCegarLoop]: Abstraction has 10355 states and 39325 transitions. [2021-07-09 18:34:24,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 39325 transitions. [2021-07-09 18:34:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:24,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:24,969 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:25,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4006 [2021-07-09 18:34:25,185 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-07-09 18:34:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:25,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932391287] [2021-07-09 18:34:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:25,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932391287] [2021-07-09 18:34:25,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932391287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:25,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645368088] [2021-07-09 18:34:25,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:25,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:34:25,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:25,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:25,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645368088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:25,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:25,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:34:25,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815497172] [2021-07-09 18:34:25,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:34:25,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:25,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:34:25,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:34:25,338 INFO L87 Difference]: Start difference. First operand 10355 states and 39325 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:26,502 INFO L93 Difference]: Finished difference Result 17924 states and 64133 transitions. [2021-07-09 18:34:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:34:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:26,546 INFO L225 Difference]: With dead ends: 17924 [2021-07-09 18:34:26,547 INFO L226 Difference]: Without dead ends: 17888 [2021-07-09 18:34:26,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 671.6ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:34:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17888 states. [2021-07-09 18:34:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17888 to 10379. [2021-07-09 18:34:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 3.7969743688571977) internal successors, (39405), 10378 states have internal predecessors, (39405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 39405 transitions. [2021-07-09 18:34:26,865 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 39405 transitions. Word has length 28 [2021-07-09 18:34:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:26,865 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 39405 transitions. [2021-07-09 18:34:26,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 39405 transitions. [2021-07-09 18:34:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:26,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:26,881 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:27,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:27,097 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:27,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-07-09 18:34:27,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:27,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943009054] [2021-07-09 18:34:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:27,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:27,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943009054] [2021-07-09 18:34:27,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943009054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:27,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382995110] [2021-07-09 18:34:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:27,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:27,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:27,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:27,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:27,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382995110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:27,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:27,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:34:27,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847775443] [2021-07-09 18:34:27,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:27,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:27,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:27,253 INFO L87 Difference]: Start difference. First operand 10379 states and 39405 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:28,627 INFO L93 Difference]: Finished difference Result 26041 states and 92685 transitions. [2021-07-09 18:34:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:34:28,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:28,699 INFO L225 Difference]: With dead ends: 26041 [2021-07-09 18:34:28,699 INFO L226 Difference]: Without dead ends: 26041 [2021-07-09 18:34:28,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 794.1ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:34:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26041 states. [2021-07-09 18:34:29,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26041 to 10669. [2021-07-09 18:34:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 3.8225534308211473) internal successors, (40779), 10668 states have internal predecessors, (40779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 40779 transitions. [2021-07-09 18:34:29,078 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 40779 transitions. Word has length 28 [2021-07-09 18:34:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:29,078 INFO L482 AbstractCegarLoop]: Abstraction has 10669 states and 40779 transitions. [2021-07-09 18:34:29,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 40779 transitions. [2021-07-09 18:34:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:29,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:29,095 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:29,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4008 [2021-07-09 18:34:29,311 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:29,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-07-09 18:34:29,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:29,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309989702] [2021-07-09 18:34:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:29,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:29,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309989702] [2021-07-09 18:34:29,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309989702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:29,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581390959] [2021-07-09 18:34:29,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:29,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:34:29,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:29,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:29,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581390959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:29,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:29,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:34:29,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118610262] [2021-07-09 18:34:29,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:29,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:29,465 INFO L87 Difference]: Start difference. First operand 10669 states and 40779 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:30,829 INFO L93 Difference]: Finished difference Result 25481 states and 91317 transitions. [2021-07-09 18:34:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:34:30,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:30,904 INFO L225 Difference]: With dead ends: 25481 [2021-07-09 18:34:30,904 INFO L226 Difference]: Without dead ends: 25481 [2021-07-09 18:34:30,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 796.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:34:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2021-07-09 18:34:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 10571. [2021-07-09 18:34:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.809744560075686) internal successors, (40269), 10570 states have internal predecessors, (40269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 40269 transitions. [2021-07-09 18:34:31,278 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 40269 transitions. Word has length 28 [2021-07-09 18:34:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:31,278 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 40269 transitions. [2021-07-09 18:34:31,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 40269 transitions. [2021-07-09 18:34:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:31,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:31,296 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:31,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:31,512 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-07-09 18:34:31,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:31,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257115918] [2021-07-09 18:34:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:31,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:31,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257115918] [2021-07-09 18:34:31,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257115918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:31,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90877495] [2021-07-09 18:34:31,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:31,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:34:31,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:31,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:31,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90877495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:31,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:31,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:34:31,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020828936] [2021-07-09 18:34:31,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:34:31,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:31,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:34:31,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:34:31,686 INFO L87 Difference]: Start difference. First operand 10571 states and 40269 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:32,697 INFO L93 Difference]: Finished difference Result 20226 states and 72726 transitions. [2021-07-09 18:34:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:34:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:32,754 INFO L225 Difference]: With dead ends: 20226 [2021-07-09 18:34:32,754 INFO L226 Difference]: Without dead ends: 20226 [2021-07-09 18:34:32,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 577.4ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:34:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-07-09 18:34:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 10580. [2021-07-09 18:34:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 3.8086775687683145) internal successors, (40292), 10579 states have internal predecessors, (40292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 40292 transitions. [2021-07-09 18:34:33,085 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 40292 transitions. Word has length 28 [2021-07-09 18:34:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:33,085 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 40292 transitions. [2021-07-09 18:34:33,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 40292 transitions. [2021-07-09 18:34:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:33,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:33,104 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:33,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-07-09 18:34:33,320 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:33,320 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-07-09 18:34:33,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:33,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612679670] [2021-07-09 18:34:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:33,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:33,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612679670] [2021-07-09 18:34:33,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612679670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:33,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102261789] [2021-07-09 18:34:33,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:33,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:33,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102261789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:33,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:33,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:34:33,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172194973] [2021-07-09 18:34:33,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:34:33,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:33,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:34:33,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:34:33,460 INFO L87 Difference]: Start difference. First operand 10580 states and 40292 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:34,284 INFO L93 Difference]: Finished difference Result 18775 states and 68086 transitions. [2021-07-09 18:34:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:34:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:34,330 INFO L225 Difference]: With dead ends: 18775 [2021-07-09 18:34:34,330 INFO L226 Difference]: Without dead ends: 18775 [2021-07-09 18:34:34,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:34:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-07-09 18:34:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10592. [2021-07-09 18:34:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.807950146350675) internal successors, (40330), 10591 states have internal predecessors, (40330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40330 transitions. [2021-07-09 18:34:34,792 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40330 transitions. Word has length 28 [2021-07-09 18:34:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:34,793 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40330 transitions. [2021-07-09 18:34:34,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40330 transitions. [2021-07-09 18:34:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:34,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:34,812 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:35,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-07-09 18:34:35,028 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:35,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-07-09 18:34:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:35,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252953908] [2021-07-09 18:34:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:35,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:35,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252953908] [2021-07-09 18:34:35,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252953908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:35,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117980428] [2021-07-09 18:34:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:35,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:35,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:35,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:35,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117980428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:35,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:35,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:34:35,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875407865] [2021-07-09 18:34:35,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:35,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:35,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:35,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:35,195 INFO L87 Difference]: Start difference. First operand 10592 states and 40330 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:36,374 INFO L93 Difference]: Finished difference Result 19382 states and 69829 transitions. [2021-07-09 18:34:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:34:36,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:36,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:36,421 INFO L225 Difference]: With dead ends: 19382 [2021-07-09 18:34:36,421 INFO L226 Difference]: Without dead ends: 19382 [2021-07-09 18:34:36,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:34:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19382 states. [2021-07-09 18:34:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19382 to 10700. [2021-07-09 18:34:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10699 states have (on average 3.800729040097205) internal successors, (40664), 10699 states have internal predecessors, (40664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 40664 transitions. [2021-07-09 18:34:36,736 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 40664 transitions. Word has length 28 [2021-07-09 18:34:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:36,736 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 40664 transitions. [2021-07-09 18:34:36,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 40664 transitions. [2021-07-09 18:34:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:36,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:36,753 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:36,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-07-09 18:34:36,969 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-07-09 18:34:36,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:36,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109932327] [2021-07-09 18:34:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:37,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:37,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109932327] [2021-07-09 18:34:37,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109932327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:37,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879441498] [2021-07-09 18:34:37,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:37,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:34:37,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:37,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:37,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:37,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879441498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:37,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:37,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:34:37,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967693621] [2021-07-09 18:34:37,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:37,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:37,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:37,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:37,116 INFO L87 Difference]: Start difference. First operand 10700 states and 40664 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:38,169 INFO L93 Difference]: Finished difference Result 18954 states and 68665 transitions. [2021-07-09 18:34:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:34:38,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:38,215 INFO L225 Difference]: With dead ends: 18954 [2021-07-09 18:34:38,215 INFO L226 Difference]: Without dead ends: 18950 [2021-07-09 18:34:38,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:34:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-07-09 18:34:38,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 10626. [2021-07-09 18:34:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10626 states, 10625 states have (on average 3.804705882352941) internal successors, (40425), 10625 states have internal predecessors, (40425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10626 states to 10626 states and 40425 transitions. [2021-07-09 18:34:38,511 INFO L78 Accepts]: Start accepts. Automaton has 10626 states and 40425 transitions. Word has length 28 [2021-07-09 18:34:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:38,511 INFO L482 AbstractCegarLoop]: Abstraction has 10626 states and 40425 transitions. [2021-07-09 18:34:38,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 10626 states and 40425 transitions. [2021-07-09 18:34:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:38,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:38,529 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:38,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-07-09 18:34:38,744 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-07-09 18:34:38,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:38,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919508693] [2021-07-09 18:34:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:38,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919508693] [2021-07-09 18:34:38,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919508693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487129084] [2021-07-09 18:34:38,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:38,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:38,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487129084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:38,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:38,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:34:38,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284253237] [2021-07-09 18:34:38,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:38,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:38,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:38,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:38,899 INFO L87 Difference]: Start difference. First operand 10626 states and 40425 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:40,034 INFO L93 Difference]: Finished difference Result 18381 states and 66150 transitions. [2021-07-09 18:34:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:34:40,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:40,196 INFO L225 Difference]: With dead ends: 18381 [2021-07-09 18:34:40,197 INFO L226 Difference]: Without dead ends: 18381 [2021-07-09 18:34:40,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:34:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18381 states. [2021-07-09 18:34:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18381 to 10853. [2021-07-09 18:34:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10852 states have (on average 3.807869517139698) internal successors, (41323), 10852 states have internal predecessors, (41323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 41323 transitions. [2021-07-09 18:34:40,483 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 41323 transitions. Word has length 28 [2021-07-09 18:34:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:40,483 INFO L482 AbstractCegarLoop]: Abstraction has 10853 states and 41323 transitions. [2021-07-09 18:34:40,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 41323 transitions. [2021-07-09 18:34:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:40,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:40,501 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:40,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:40,716 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-07-09 18:34:40,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:40,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758425308] [2021-07-09 18:34:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:40,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:40,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758425308] [2021-07-09 18:34:40,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758425308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:40,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490310923] [2021-07-09 18:34:40,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:40,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:34:40,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:40,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:40,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490310923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:40,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:40,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:34:40,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871719940] [2021-07-09 18:34:40,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:40,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:40,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:40,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:40,862 INFO L87 Difference]: Start difference. First operand 10853 states and 41323 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:41,866 INFO L93 Difference]: Finished difference Result 18091 states and 65344 transitions. [2021-07-09 18:34:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:34:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:41,912 INFO L225 Difference]: With dead ends: 18091 [2021-07-09 18:34:41,912 INFO L226 Difference]: Without dead ends: 18079 [2021-07-09 18:34:41,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:34:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18079 states. [2021-07-09 18:34:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18079 to 10955. [2021-07-09 18:34:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 10954 states have (on average 3.8018988497352564) internal successors, (41646), 10954 states have internal predecessors, (41646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 41646 transitions. [2021-07-09 18:34:42,346 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 41646 transitions. Word has length 28 [2021-07-09 18:34:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:42,346 INFO L482 AbstractCegarLoop]: Abstraction has 10955 states and 41646 transitions. [2021-07-09 18:34:42,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 41646 transitions. [2021-07-09 18:34:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:42,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:42,365 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:42,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:42,581 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:42,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 71 times [2021-07-09 18:34:42,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:42,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30981379] [2021-07-09 18:34:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:42,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:42,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30981379] [2021-07-09 18:34:42,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30981379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:42,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786930830] [2021-07-09 18:34:42,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:42,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:34:42,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:42,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:42,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786930830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:42,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:42,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:34:42,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924065106] [2021-07-09 18:34:42,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:42,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:42,708 INFO L87 Difference]: Start difference. First operand 10955 states and 41646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:43,162 INFO L93 Difference]: Finished difference Result 15599 states and 57718 transitions. [2021-07-09 18:34:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:34:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:43,210 INFO L225 Difference]: With dead ends: 15599 [2021-07-09 18:34:43,210 INFO L226 Difference]: Without dead ends: 15599 [2021-07-09 18:34:43,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:34:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2021-07-09 18:34:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 11027. [2021-07-09 18:34:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11027 states, 11026 states have (on average 3.7972066025757303) internal successors, (41868), 11026 states have internal predecessors, (41868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11027 states to 11027 states and 41868 transitions. [2021-07-09 18:34:43,505 INFO L78 Accepts]: Start accepts. Automaton has 11027 states and 41868 transitions. Word has length 28 [2021-07-09 18:34:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:43,506 INFO L482 AbstractCegarLoop]: Abstraction has 11027 states and 41868 transitions. [2021-07-09 18:34:43,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 11027 states and 41868 transitions. [2021-07-09 18:34:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:43,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:43,524 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:43,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:43,739 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 72 times [2021-07-09 18:34:43,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:43,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082564641] [2021-07-09 18:34:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:43,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:43,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082564641] [2021-07-09 18:34:43,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082564641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:43,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671725340] [2021-07-09 18:34:43,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:43,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:34:43,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:43,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:43,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:43,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671725340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:43,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:43,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:34:43,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857778187] [2021-07-09 18:34:43,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:43,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:43,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:43,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:43,862 INFO L87 Difference]: Start difference. First operand 11027 states and 41868 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:44,432 INFO L93 Difference]: Finished difference Result 16567 states and 60532 transitions. [2021-07-09 18:34:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:34:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:44,475 INFO L225 Difference]: With dead ends: 16567 [2021-07-09 18:34:44,475 INFO L226 Difference]: Without dead ends: 16567 [2021-07-09 18:34:44,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:34:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16567 states. [2021-07-09 18:34:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16567 to 11355. [2021-07-09 18:34:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 3.779284833538841) internal successors, (42910), 11354 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 42910 transitions. [2021-07-09 18:34:44,771 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 42910 transitions. Word has length 28 [2021-07-09 18:34:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:44,771 INFO L482 AbstractCegarLoop]: Abstraction has 11355 states and 42910 transitions. [2021-07-09 18:34:44,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 42910 transitions. [2021-07-09 18:34:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:44,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:44,791 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:44,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:44,991 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 73 times [2021-07-09 18:34:44,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:44,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707596155] [2021-07-09 18:34:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:45,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:45,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707596155] [2021-07-09 18:34:45,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707596155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:45,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821514612] [2021-07-09 18:34:45,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:45,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821514612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:45,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:45,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:34:45,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306086226] [2021-07-09 18:34:45,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:45,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:45,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:45,147 INFO L87 Difference]: Start difference. First operand 11355 states and 42910 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:45,727 INFO L93 Difference]: Finished difference Result 16375 states and 60421 transitions. [2021-07-09 18:34:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:34:45,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:45,768 INFO L225 Difference]: With dead ends: 16375 [2021-07-09 18:34:45,769 INFO L226 Difference]: Without dead ends: 16331 [2021-07-09 18:34:45,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:34:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-07-09 18:34:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 13242. [2021-07-09 18:34:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13242 states, 13241 states have (on average 3.819726606751756) internal successors, (50577), 13241 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13242 states to 13242 states and 50577 transitions. [2021-07-09 18:34:46,064 INFO L78 Accepts]: Start accepts. Automaton has 13242 states and 50577 transitions. Word has length 28 [2021-07-09 18:34:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:46,064 INFO L482 AbstractCegarLoop]: Abstraction has 13242 states and 50577 transitions. [2021-07-09 18:34:46,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 13242 states and 50577 transitions. [2021-07-09 18:34:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:46,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:46,087 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:46,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:46,303 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:46,303 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 74 times [2021-07-09 18:34:46,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:46,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238836163] [2021-07-09 18:34:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:46,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:46,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238836163] [2021-07-09 18:34:46,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238836163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:46,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077815167] [2021-07-09 18:34:46,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:46,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:46,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:46,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:46,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077815167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:46,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:46,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:34:46,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317919464] [2021-07-09 18:34:46,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:46,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:46,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:46,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:46,417 INFO L87 Difference]: Start difference. First operand 13242 states and 50577 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:46,868 INFO L93 Difference]: Finished difference Result 18146 states and 67670 transitions. [2021-07-09 18:34:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:34:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:46,915 INFO L225 Difference]: With dead ends: 18146 [2021-07-09 18:34:46,915 INFO L226 Difference]: Without dead ends: 18138 [2021-07-09 18:34:46,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:34:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18138 states. [2021-07-09 18:34:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18138 to 13160. [2021-07-09 18:34:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 3.8226308990044835) internal successors, (50302), 13159 states have internal predecessors, (50302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 50302 transitions. [2021-07-09 18:34:47,234 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 50302 transitions. Word has length 28 [2021-07-09 18:34:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:47,234 INFO L482 AbstractCegarLoop]: Abstraction has 13160 states and 50302 transitions. [2021-07-09 18:34:47,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 50302 transitions. [2021-07-09 18:34:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:47,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:47,257 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:47,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:47,473 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 75 times [2021-07-09 18:34:47,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:47,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555619497] [2021-07-09 18:34:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:47,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:47,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555619497] [2021-07-09 18:34:47,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555619497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:47,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610172380] [2021-07-09 18:34:47,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:47,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:34:47,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:47,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:47,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:47,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610172380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:47,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:47,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:34:47,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300320682] [2021-07-09 18:34:47,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:47,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:47,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:47,591 INFO L87 Difference]: Start difference. First operand 13160 states and 50302 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:48,150 INFO L93 Difference]: Finished difference Result 18024 states and 67311 transitions. [2021-07-09 18:34:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:34:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:48,195 INFO L225 Difference]: With dead ends: 18024 [2021-07-09 18:34:48,195 INFO L226 Difference]: Without dead ends: 18012 [2021-07-09 18:34:48,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:34:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-07-09 18:34:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 13126. [2021-07-09 18:34:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 13125 states have (on average 3.8246857142857142) internal successors, (50199), 13125 states have internal predecessors, (50199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 50199 transitions. [2021-07-09 18:34:48,508 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 50199 transitions. Word has length 28 [2021-07-09 18:34:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:48,508 INFO L482 AbstractCegarLoop]: Abstraction has 13126 states and 50199 transitions. [2021-07-09 18:34:48,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 50199 transitions. [2021-07-09 18:34:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:48,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:48,532 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:48,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-07-09 18:34:48,747 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:48,748 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 76 times [2021-07-09 18:34:48,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:48,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346974143] [2021-07-09 18:34:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:48,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:48,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346974143] [2021-07-09 18:34:48,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346974143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:48,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121126212] [2021-07-09 18:34:48,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:48,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:48,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:48,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121126212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:48,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:48,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:34:48,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352353623] [2021-07-09 18:34:48,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:34:48,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:34:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:34:48,900 INFO L87 Difference]: Start difference. First operand 13126 states and 50199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:49,919 INFO L93 Difference]: Finished difference Result 24612 states and 88773 transitions. [2021-07-09 18:34:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:34:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:49,986 INFO L225 Difference]: With dead ends: 24612 [2021-07-09 18:34:49,986 INFO L226 Difference]: Without dead ends: 24612 [2021-07-09 18:34:49,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:34:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24612 states. [2021-07-09 18:34:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24612 to 13108. [2021-07-09 18:34:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 3.8236057068741895) internal successors, (50116), 13107 states have internal predecessors, (50116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 50116 transitions. [2021-07-09 18:34:50,366 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 50116 transitions. Word has length 28 [2021-07-09 18:34:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:50,366 INFO L482 AbstractCegarLoop]: Abstraction has 13108 states and 50116 transitions. [2021-07-09 18:34:50,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 50116 transitions. [2021-07-09 18:34:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:50,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:50,391 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:50,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-07-09 18:34:50,607 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-07-09 18:34:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:50,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463331261] [2021-07-09 18:34:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:50,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:50,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463331261] [2021-07-09 18:34:50,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463331261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:50,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147610795] [2021-07-09 18:34:50,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:50,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:50,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:50,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147610795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:50,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:50,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:34:50,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250656306] [2021-07-09 18:34:50,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:50,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:50,737 INFO L87 Difference]: Start difference. First operand 13108 states and 50116 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:51,503 INFO L93 Difference]: Finished difference Result 20270 states and 73737 transitions. [2021-07-09 18:34:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:34:51,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:51,558 INFO L225 Difference]: With dead ends: 20270 [2021-07-09 18:34:51,558 INFO L226 Difference]: Without dead ends: 20257 [2021-07-09 18:34:51,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 373.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2021-07-09 18:34:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 14410. [2021-07-09 18:34:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14410 states, 14409 states have (on average 3.8785481296411963) internal successors, (55886), 14409 states have internal predecessors, (55886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 55886 transitions. [2021-07-09 18:34:51,951 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 55886 transitions. Word has length 28 [2021-07-09 18:34:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:51,951 INFO L482 AbstractCegarLoop]: Abstraction has 14410 states and 55886 transitions. [2021-07-09 18:34:51,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 55886 transitions. [2021-07-09 18:34:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:51,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:51,980 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:52,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-07-09 18:34:52,196 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:52,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-07-09 18:34:52,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:52,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644340470] [2021-07-09 18:34:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:52,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:52,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644340470] [2021-07-09 18:34:52,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644340470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:52,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989665271] [2021-07-09 18:34:52,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:52,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989665271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:52,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:52,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:34:52,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242841295] [2021-07-09 18:34:52,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:52,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:52,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:52,325 INFO L87 Difference]: Start difference. First operand 14410 states and 55886 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:53,115 INFO L93 Difference]: Finished difference Result 20362 states and 73979 transitions. [2021-07-09 18:34:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:34:53,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:53,165 INFO L225 Difference]: With dead ends: 20362 [2021-07-09 18:34:53,165 INFO L226 Difference]: Without dead ends: 20356 [2021-07-09 18:34:53,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:34:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-07-09 18:34:53,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 14386. [2021-07-09 18:34:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14386 states, 14385 states have (on average 3.877650330205075) internal successors, (55780), 14385 states have internal predecessors, (55780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14386 states to 14386 states and 55780 transitions. [2021-07-09 18:34:53,641 INFO L78 Accepts]: Start accepts. Automaton has 14386 states and 55780 transitions. Word has length 28 [2021-07-09 18:34:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:53,641 INFO L482 AbstractCegarLoop]: Abstraction has 14386 states and 55780 transitions. [2021-07-09 18:34:53,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 14386 states and 55780 transitions. [2021-07-09 18:34:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:53,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:53,669 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:53,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-07-09 18:34:53,884 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:53,884 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-07-09 18:34:53,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:53,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239691261] [2021-07-09 18:34:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:53,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:53,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239691261] [2021-07-09 18:34:53,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239691261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:53,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576427789] [2021-07-09 18:34:53,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:53,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:53,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:53,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:54,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576427789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:54,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:54,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:34:54,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746754365] [2021-07-09 18:34:54,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:54,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:54,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:54,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:54,002 INFO L87 Difference]: Start difference. First operand 14386 states and 55780 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:54,719 INFO L93 Difference]: Finished difference Result 23158 states and 84169 transitions. [2021-07-09 18:34:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:34:54,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:54,778 INFO L225 Difference]: With dead ends: 23158 [2021-07-09 18:34:54,778 INFO L226 Difference]: Without dead ends: 23145 [2021-07-09 18:34:54,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 342.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:34:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23145 states. [2021-07-09 18:34:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23145 to 14458. [2021-07-09 18:34:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14458 states, 14457 states have (on average 3.882548246524175) internal successors, (56130), 14457 states have internal predecessors, (56130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14458 states to 14458 states and 56130 transitions. [2021-07-09 18:34:55,186 INFO L78 Accepts]: Start accepts. Automaton has 14458 states and 56130 transitions. Word has length 28 [2021-07-09 18:34:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:55,186 INFO L482 AbstractCegarLoop]: Abstraction has 14458 states and 56130 transitions. [2021-07-09 18:34:55,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 14458 states and 56130 transitions. [2021-07-09 18:34:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:55,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:55,211 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:55,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-07-09 18:34:55,425 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-07-09 18:34:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130078454] [2021-07-09 18:34:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:55,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:55,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130078454] [2021-07-09 18:34:55,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130078454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:55,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043247620] [2021-07-09 18:34:55,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:55,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:55,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:55,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:55,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043247620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:55,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:55,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:34:55,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774825093] [2021-07-09 18:34:55,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:55,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:55,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:55,547 INFO L87 Difference]: Start difference. First operand 14458 states and 56130 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:56,253 INFO L93 Difference]: Finished difference Result 24792 states and 89366 transitions. [2021-07-09 18:34:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:34:56,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:56,448 INFO L225 Difference]: With dead ends: 24792 [2021-07-09 18:34:56,448 INFO L226 Difference]: Without dead ends: 24792 [2021-07-09 18:34:56,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:34:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24792 states. [2021-07-09 18:34:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24792 to 14502. [2021-07-09 18:34:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14502 states, 14501 states have (on average 3.8793876284394178) internal successors, (56255), 14501 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14502 states to 14502 states and 56255 transitions. [2021-07-09 18:34:56,835 INFO L78 Accepts]: Start accepts. Automaton has 14502 states and 56255 transitions. Word has length 28 [2021-07-09 18:34:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:56,835 INFO L482 AbstractCegarLoop]: Abstraction has 14502 states and 56255 transitions. [2021-07-09 18:34:56,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 14502 states and 56255 transitions. [2021-07-09 18:34:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:56,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:56,860 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:57,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:57,076 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 77 times [2021-07-09 18:34:57,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:57,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072687696] [2021-07-09 18:34:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:57,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:57,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072687696] [2021-07-09 18:34:57,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072687696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:57,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41123088] [2021-07-09 18:34:57,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:57,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:34:57,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:57,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:34:57,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:57,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41123088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:57,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:57,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:34:57,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607176036] [2021-07-09 18:34:57,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:57,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:57,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:57,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:57,213 INFO L87 Difference]: Start difference. First operand 14502 states and 56255 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:58,214 INFO L93 Difference]: Finished difference Result 24486 states and 90901 transitions. [2021-07-09 18:34:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:34:58,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:58,298 INFO L225 Difference]: With dead ends: 24486 [2021-07-09 18:34:58,298 INFO L226 Difference]: Without dead ends: 24482 [2021-07-09 18:34:58,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 554.1ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:34:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24482 states. [2021-07-09 18:34:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24482 to 14756. [2021-07-09 18:34:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14756 states, 14755 states have (on average 3.869739071501186) internal successors, (57098), 14755 states have internal predecessors, (57098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14756 states to 14756 states and 57098 transitions. [2021-07-09 18:34:58,950 INFO L78 Accepts]: Start accepts. Automaton has 14756 states and 57098 transitions. Word has length 28 [2021-07-09 18:34:58,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:58,950 INFO L482 AbstractCegarLoop]: Abstraction has 14756 states and 57098 transitions. [2021-07-09 18:34:58,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 14756 states and 57098 transitions. [2021-07-09 18:34:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:34:58,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:58,975 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:59,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:59,189 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:59,189 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-07-09 18:34:59,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:59,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817258595] [2021-07-09 18:34:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:59,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:59,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817258595] [2021-07-09 18:34:59,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817258595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:59,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867541404] [2021-07-09 18:34:59,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:59,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:59,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:34:59,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:59,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867541404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:59,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:59,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:34:59,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560380002] [2021-07-09 18:34:59,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:59,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:59,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:59,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:59,302 INFO L87 Difference]: Start difference. First operand 14756 states and 57098 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:59,908 INFO L93 Difference]: Finished difference Result 21631 states and 80082 transitions. [2021-07-09 18:34:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:34:59,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:34:59,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:59,967 INFO L225 Difference]: With dead ends: 21631 [2021-07-09 18:34:59,967 INFO L226 Difference]: Without dead ends: 21608 [2021-07-09 18:34:59,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:34:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21608 states. [2021-07-09 18:35:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21608 to 15111. [2021-07-09 18:35:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15111 states, 15110 states have (on average 3.888682991396426) internal successors, (58758), 15110 states have internal predecessors, (58758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15111 states to 15111 states and 58758 transitions. [2021-07-09 18:35:00,353 INFO L78 Accepts]: Start accepts. Automaton has 15111 states and 58758 transitions. Word has length 28 [2021-07-09 18:35:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:00,353 INFO L482 AbstractCegarLoop]: Abstraction has 15111 states and 58758 transitions. [2021-07-09 18:35:00,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:00,353 INFO L276 IsEmpty]: Start isEmpty. Operand 15111 states and 58758 transitions. [2021-07-09 18:35:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:00,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:00,378 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:00,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4027 [2021-07-09 18:35:00,592 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:00,592 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-07-09 18:35:00,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:00,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107546248] [2021-07-09 18:35:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:00,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107546248] [2021-07-09 18:35:00,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107546248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143963644] [2021-07-09 18:35:00,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:00,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:35:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:00,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143963644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:00,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:00,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:35:00,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981988854] [2021-07-09 18:35:00,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:35:00,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:35:00,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:35:00,718 INFO L87 Difference]: Start difference. First operand 15111 states and 58758 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:01,593 INFO L93 Difference]: Finished difference Result 21728 states and 79303 transitions. [2021-07-09 18:35:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:35:01,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:01,655 INFO L225 Difference]: With dead ends: 21728 [2021-07-09 18:35:01,655 INFO L226 Difference]: Without dead ends: 21728 [2021-07-09 18:35:01,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 502.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:35:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21728 states. [2021-07-09 18:35:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21728 to 15230. [2021-07-09 18:35:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15230 states, 15229 states have (on average 3.880753824939261) internal successors, (59100), 15229 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15230 states to 15230 states and 59100 transitions. [2021-07-09 18:35:02,086 INFO L78 Accepts]: Start accepts. Automaton has 15230 states and 59100 transitions. Word has length 28 [2021-07-09 18:35:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:02,086 INFO L482 AbstractCegarLoop]: Abstraction has 15230 states and 59100 transitions. [2021-07-09 18:35:02,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 15230 states and 59100 transitions. [2021-07-09 18:35:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:02,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:02,110 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:02,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:02,324 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:02,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:02,326 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-07-09 18:35:02,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:02,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032163480] [2021-07-09 18:35:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:02,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:02,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032163480] [2021-07-09 18:35:02,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032163480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:02,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304057360] [2021-07-09 18:35:02,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:02,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:35:02,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:35:02,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:02,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304057360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:02,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:02,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:35:02,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48799050] [2021-07-09 18:35:02,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:35:02,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:02,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:35:02,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:35:02,476 INFO L87 Difference]: Start difference. First operand 15230 states and 59100 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:03,240 INFO L93 Difference]: Finished difference Result 24246 states and 88914 transitions. [2021-07-09 18:35:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:35:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:03,305 INFO L225 Difference]: With dead ends: 24246 [2021-07-09 18:35:03,305 INFO L226 Difference]: Without dead ends: 24246 [2021-07-09 18:35:03,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:35:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2021-07-09 18:35:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16389. [2021-07-09 18:35:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 16388 states have (on average 3.862521357090554) internal successors, (63299), 16388 states have internal predecessors, (63299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 63299 transitions. [2021-07-09 18:35:03,709 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 63299 transitions. Word has length 28 [2021-07-09 18:35:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:03,709 INFO L482 AbstractCegarLoop]: Abstraction has 16389 states and 63299 transitions. [2021-07-09 18:35:03,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 63299 transitions. [2021-07-09 18:35:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:03,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:03,736 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:03,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:03,949 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:03,949 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-07-09 18:35:03,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:03,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000791151] [2021-07-09 18:35:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:03,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:03,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000791151] [2021-07-09 18:35:03,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000791151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:03,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975852363] [2021-07-09 18:35:03,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:35:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:04,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975852363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:04,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:04,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:35:04,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376897995] [2021-07-09 18:35:04,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:35:04,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:04,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:35:04,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:35:04,074 INFO L87 Difference]: Start difference. First operand 16389 states and 63299 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:04,574 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 18:35:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:05,094 INFO L93 Difference]: Finished difference Result 27385 states and 99086 transitions. [2021-07-09 18:35:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:35:05,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:05,173 INFO L225 Difference]: With dead ends: 27385 [2021-07-09 18:35:05,173 INFO L226 Difference]: Without dead ends: 27385 [2021-07-09 18:35:05,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:35:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27385 states. [2021-07-09 18:35:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27385 to 16619. [2021-07-09 18:35:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16619 states, 16618 states have (on average 3.8775424238777227) internal successors, (64437), 16618 states have internal predecessors, (64437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16619 states to 16619 states and 64437 transitions. [2021-07-09 18:35:05,640 INFO L78 Accepts]: Start accepts. Automaton has 16619 states and 64437 transitions. Word has length 28 [2021-07-09 18:35:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:05,640 INFO L482 AbstractCegarLoop]: Abstraction has 16619 states and 64437 transitions. [2021-07-09 18:35:05,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 16619 states and 64437 transitions. [2021-07-09 18:35:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:05,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:05,667 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:05,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-07-09 18:35:05,882 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:05,883 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 78 times [2021-07-09 18:35:05,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:05,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921672794] [2021-07-09 18:35:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:05,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:05,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921672794] [2021-07-09 18:35:05,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921672794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:05,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765383360] [2021-07-09 18:35:05,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:05,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:35:05,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:05,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:05,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:06,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765383360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:06,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:06,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:35:06,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911752885] [2021-07-09 18:35:06,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:35:06,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:06,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:35:06,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:35:06,042 INFO L87 Difference]: Start difference. First operand 16619 states and 64437 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:07,675 INFO L93 Difference]: Finished difference Result 42879 states and 155463 transitions. [2021-07-09 18:35:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:35:07,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:07,804 INFO L225 Difference]: With dead ends: 42879 [2021-07-09 18:35:07,804 INFO L226 Difference]: Without dead ends: 42879 [2021-07-09 18:35:07,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 946.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:35:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42879 states. [2021-07-09 18:35:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42879 to 17863. [2021-07-09 18:35:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.9155189788377562) internal successors, (69939), 17862 states have internal predecessors, (69939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 69939 transitions. [2021-07-09 18:35:08,688 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 69939 transitions. Word has length 28 [2021-07-09 18:35:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:08,688 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 69939 transitions. [2021-07-09 18:35:08,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 69939 transitions. [2021-07-09 18:35:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:08,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:08,718 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:08,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4031,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:08,934 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 79 times [2021-07-09 18:35:08,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:08,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103201401] [2021-07-09 18:35:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:08,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:08,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103201401] [2021-07-09 18:35:08,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103201401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:08,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834211348] [2021-07-09 18:35:08,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834211348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:09,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:09,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:35:09,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969119655] [2021-07-09 18:35:09,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:35:09,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:35:09,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:35:09,088 INFO L87 Difference]: Start difference. First operand 17863 states and 69939 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:10,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:10,761 INFO L93 Difference]: Finished difference Result 41907 states and 152905 transitions. [2021-07-09 18:35:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:35:10,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:10,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:10,889 INFO L225 Difference]: With dead ends: 41907 [2021-07-09 18:35:10,889 INFO L226 Difference]: Without dead ends: 41907 [2021-07-09 18:35:10,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 913.9ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:35:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41907 states. [2021-07-09 18:35:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41907 to 17837. [2021-07-09 18:35:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.912480376766091) internal successors, (69783), 17836 states have internal predecessors, (69783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 69783 transitions. [2021-07-09 18:35:11,635 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 69783 transitions. Word has length 28 [2021-07-09 18:35:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:11,635 INFO L482 AbstractCegarLoop]: Abstraction has 17837 states and 69783 transitions. [2021-07-09 18:35:11,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 69783 transitions. [2021-07-09 18:35:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:11,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:11,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:11,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-07-09 18:35:11,879 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:11,880 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-07-09 18:35:11,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:11,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739637597] [2021-07-09 18:35:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:11,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739637597] [2021-07-09 18:35:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739637597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:11,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10527275] [2021-07-09 18:35:11,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:11,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:35:11,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:35:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10527275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:11,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:11,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:35:11,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523013164] [2021-07-09 18:35:11,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:35:11,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:35:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:35:11,985 INFO L87 Difference]: Start difference. First operand 17837 states and 69783 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:12,350 INFO L93 Difference]: Finished difference Result 28682 states and 110964 transitions. [2021-07-09 18:35:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:35:12,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:12,437 INFO L225 Difference]: With dead ends: 28682 [2021-07-09 18:35:12,437 INFO L226 Difference]: Without dead ends: 28632 [2021-07-09 18:35:12,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:35:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28632 states. [2021-07-09 18:35:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28632 to 23563. [2021-07-09 18:35:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23563 states, 23562 states have (on average 3.9230965113318055) internal successors, (92436), 23562 states have internal predecessors, (92436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23563 states to 23563 states and 92436 transitions. [2021-07-09 18:35:12,977 INFO L78 Accepts]: Start accepts. Automaton has 23563 states and 92436 transitions. Word has length 28 [2021-07-09 18:35:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:12,978 INFO L482 AbstractCegarLoop]: Abstraction has 23563 states and 92436 transitions. [2021-07-09 18:35:12,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 23563 states and 92436 transitions. [2021-07-09 18:35:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:13,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:13,019 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:13,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-07-09 18:35:13,235 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-07-09 18:35:13,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:13,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10783816] [2021-07-09 18:35:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:13,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:13,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10783816] [2021-07-09 18:35:13,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10783816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:13,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904819782] [2021-07-09 18:35:13,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:13,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:35:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:35:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:13,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904819782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:13,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:13,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:35:13,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883123203] [2021-07-09 18:35:13,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:35:13,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:35:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:35:13,339 INFO L87 Difference]: Start difference. First operand 23563 states and 92436 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:13,631 INFO L93 Difference]: Finished difference Result 26308 states and 100773 transitions. [2021-07-09 18:35:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:35:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:13,708 INFO L225 Difference]: With dead ends: 26308 [2021-07-09 18:35:13,708 INFO L226 Difference]: Without dead ends: 26308 [2021-07-09 18:35:13,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26308 states. [2021-07-09 18:35:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26308 to 23066. [2021-07-09 18:35:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23066 states, 23065 states have (on average 3.9134619553435943) internal successors, (90264), 23065 states have internal predecessors, (90264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23066 states to 23066 states and 90264 transitions. [2021-07-09 18:35:14,227 INFO L78 Accepts]: Start accepts. Automaton has 23066 states and 90264 transitions. Word has length 28 [2021-07-09 18:35:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:14,227 INFO L482 AbstractCegarLoop]: Abstraction has 23066 states and 90264 transitions. [2021-07-09 18:35:14,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 23066 states and 90264 transitions. [2021-07-09 18:35:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:14,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:14,266 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:14,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-07-09 18:35:14,481 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-07-09 18:35:14,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:14,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75421167] [2021-07-09 18:35:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:14,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75421167] [2021-07-09 18:35:14,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75421167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812966320] [2021-07-09 18:35:14,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:14,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:14,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:14,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:14,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812966320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:14,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:14,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:35:14,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571980878] [2021-07-09 18:35:14,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:35:14,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:14,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:35:14,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:35:14,775 INFO L87 Difference]: Start difference. First operand 23066 states and 90264 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:15,819 INFO L93 Difference]: Finished difference Result 35513 states and 132496 transitions. [2021-07-09 18:35:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:35:15,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:15,928 INFO L225 Difference]: With dead ends: 35513 [2021-07-09 18:35:15,928 INFO L226 Difference]: Without dead ends: 35513 [2021-07-09 18:35:15,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:35:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35513 states. [2021-07-09 18:35:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35513 to 23134. [2021-07-09 18:35:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 23133 states have (on average 3.9115981498292482) internal successors, (90487), 23133 states have internal predecessors, (90487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 90487 transitions. [2021-07-09 18:35:16,742 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 90487 transitions. Word has length 28 [2021-07-09 18:35:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:16,742 INFO L482 AbstractCegarLoop]: Abstraction has 23134 states and 90487 transitions. [2021-07-09 18:35:16,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 90487 transitions. [2021-07-09 18:35:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:16,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:16,781 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:16,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-07-09 18:35:16,996 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-07-09 18:35:16,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:16,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547156286] [2021-07-09 18:35:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:17,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:17,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547156286] [2021-07-09 18:35:17,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547156286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:17,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666999334] [2021-07-09 18:35:17,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:17,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:35:17,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:17,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:17,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:17,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666999334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:17,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:17,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:35:17,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938233425] [2021-07-09 18:35:17,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:35:17,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:17,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:35:17,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:35:17,147 INFO L87 Difference]: Start difference. First operand 23134 states and 90487 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:18,954 INFO L93 Difference]: Finished difference Result 45671 states and 168413 transitions. [2021-07-09 18:35:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:35:18,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:19,126 INFO L225 Difference]: With dead ends: 45671 [2021-07-09 18:35:19,126 INFO L226 Difference]: Without dead ends: 45671 [2021-07-09 18:35:19,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:35:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45671 states. [2021-07-09 18:35:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45671 to 23135. [2021-07-09 18:35:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23135 states, 23134 states have (on average 3.913460707184231) internal successors, (90534), 23134 states have internal predecessors, (90534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23135 states to 23135 states and 90534 transitions. [2021-07-09 18:35:20,098 INFO L78 Accepts]: Start accepts. Automaton has 23135 states and 90534 transitions. Word has length 28 [2021-07-09 18:35:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:20,098 INFO L482 AbstractCegarLoop]: Abstraction has 23135 states and 90534 transitions. [2021-07-09 18:35:20,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 23135 states and 90534 transitions. [2021-07-09 18:35:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:20,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:20,310 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:20,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:20,525 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-07-09 18:35:20,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:20,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631696284] [2021-07-09 18:35:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:20,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:20,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631696284] [2021-07-09 18:35:20,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631696284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:20,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421831256] [2021-07-09 18:35:20,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:20,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:35:20,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:20,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:20,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421831256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:20,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:20,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:35:20,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413201399] [2021-07-09 18:35:20,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:35:20,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:20,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:35:20,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:35:20,705 INFO L87 Difference]: Start difference. First operand 23135 states and 90534 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:22,351 INFO L93 Difference]: Finished difference Result 45296 states and 167759 transitions. [2021-07-09 18:35:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:35:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:22,621 INFO L225 Difference]: With dead ends: 45296 [2021-07-09 18:35:22,622 INFO L226 Difference]: Without dead ends: 45296 [2021-07-09 18:35:22,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 913.6ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:35:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45296 states. [2021-07-09 18:35:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45296 to 22919. [2021-07-09 18:35:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22919 states, 22918 states have (on average 3.9066236146260582) internal successors, (89532), 22918 states have internal predecessors, (89532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22919 states to 22919 states and 89532 transitions. [2021-07-09 18:35:23,710 INFO L78 Accepts]: Start accepts. Automaton has 22919 states and 89532 transitions. Word has length 28 [2021-07-09 18:35:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:23,710 INFO L482 AbstractCegarLoop]: Abstraction has 22919 states and 89532 transitions. [2021-07-09 18:35:23,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22919 states and 89532 transitions. [2021-07-09 18:35:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:23,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:23,748 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:23,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:23,964 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:23,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:23,964 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-07-09 18:35:23,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:23,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611112162] [2021-07-09 18:35:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:23,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611112162] [2021-07-09 18:35:23,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611112162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925584968] [2021-07-09 18:35:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:24,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:35:24,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:35:24,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925584968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:24,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:24,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:35:24,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752861795] [2021-07-09 18:35:24,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:35:24,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:24,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:35:24,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:35:24,072 INFO L87 Difference]: Start difference. First operand 22919 states and 89532 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:24,470 INFO L93 Difference]: Finished difference Result 35247 states and 132459 transitions. [2021-07-09 18:35:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:35:24,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:24,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:24,768 INFO L225 Difference]: With dead ends: 35247 [2021-07-09 18:35:24,768 INFO L226 Difference]: Without dead ends: 35230 [2021-07-09 18:35:24,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35230 states. [2021-07-09 18:35:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35230 to 23187. [2021-07-09 18:35:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23187 states, 23186 states have (on average 3.9111532821530233) internal successors, (90684), 23186 states have internal predecessors, (90684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23187 states to 23187 states and 90684 transitions. [2021-07-09 18:35:25,633 INFO L78 Accepts]: Start accepts. Automaton has 23187 states and 90684 transitions. Word has length 28 [2021-07-09 18:35:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:25,634 INFO L482 AbstractCegarLoop]: Abstraction has 23187 states and 90684 transitions. [2021-07-09 18:35:25,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 23187 states and 90684 transitions. [2021-07-09 18:35:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:25,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:25,671 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:25,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:25,885 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-07-09 18:35:25,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:25,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497538611] [2021-07-09 18:35:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:25,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:25,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497538611] [2021-07-09 18:35:25,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497538611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:25,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016144022] [2021-07-09 18:35:25,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:25,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:35:25,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:35:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:35:25,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016144022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:25,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:25,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:35:25,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977051730] [2021-07-09 18:35:25,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:35:25,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:25,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:35:25,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:35:25,998 INFO L87 Difference]: Start difference. First operand 23187 states and 90684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:26,483 INFO L93 Difference]: Finished difference Result 37405 states and 139306 transitions. [2021-07-09 18:35:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:35:26,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:26,597 INFO L225 Difference]: With dead ends: 37405 [2021-07-09 18:35:26,597 INFO L226 Difference]: Without dead ends: 37405 [2021-07-09 18:35:26,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37405 states. [2021-07-09 18:35:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37405 to 22856. [2021-07-09 18:35:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22856 states, 22855 states have (on average 3.898402975278932) internal successors, (89098), 22855 states have internal predecessors, (89098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22856 states to 22856 states and 89098 transitions. [2021-07-09 18:35:27,474 INFO L78 Accepts]: Start accepts. Automaton has 22856 states and 89098 transitions. Word has length 28 [2021-07-09 18:35:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:27,474 INFO L482 AbstractCegarLoop]: Abstraction has 22856 states and 89098 transitions. [2021-07-09 18:35:27,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 22856 states and 89098 transitions. [2021-07-09 18:35:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:27,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:27,512 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:27,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:27,727 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-07-09 18:35:27,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:27,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578133989] [2021-07-09 18:35:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:27,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:27,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578133989] [2021-07-09 18:35:27,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578133989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:27,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235777336] [2021-07-09 18:35:27,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:27,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:35:27,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:27,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:27,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235777336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:27,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:27,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:35:27,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100259873] [2021-07-09 18:35:27,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:35:27,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:27,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:35:27,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:35:27,864 INFO L87 Difference]: Start difference. First operand 22856 states and 89098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:28,763 INFO L93 Difference]: Finished difference Result 32629 states and 122440 transitions. [2021-07-09 18:35:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:35:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:28,860 INFO L225 Difference]: With dead ends: 32629 [2021-07-09 18:35:28,860 INFO L226 Difference]: Without dead ends: 32629 [2021-07-09 18:35:28,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:35:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32629 states. [2021-07-09 18:35:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32629 to 22904. [2021-07-09 18:35:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22904 states, 22903 states have (on average 3.8973060297777584) internal successors, (89260), 22903 states have internal predecessors, (89260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22904 states to 22904 states and 89260 transitions. [2021-07-09 18:35:29,699 INFO L78 Accepts]: Start accepts. Automaton has 22904 states and 89260 transitions. Word has length 28 [2021-07-09 18:35:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:29,699 INFO L482 AbstractCegarLoop]: Abstraction has 22904 states and 89260 transitions. [2021-07-09 18:35:29,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 22904 states and 89260 transitions. [2021-07-09 18:35:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:29,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:29,742 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:29,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:29,957 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:29,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:29,957 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-07-09 18:35:29,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:29,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341272948] [2021-07-09 18:35:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:29,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:29,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341272948] [2021-07-09 18:35:29,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341272948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:29,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692942478] [2021-07-09 18:35:29,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:30,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:30,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:30,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:30,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692942478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:30,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:30,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:35:30,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124486096] [2021-07-09 18:35:30,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:35:30,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:30,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:35:30,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:35:30,094 INFO L87 Difference]: Start difference. First operand 22904 states and 89260 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:30,784 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 18:35:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:31,309 INFO L93 Difference]: Finished difference Result 34174 states and 126879 transitions. [2021-07-09 18:35:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:35:31,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:31,411 INFO L225 Difference]: With dead ends: 34174 [2021-07-09 18:35:31,411 INFO L226 Difference]: Without dead ends: 34174 [2021-07-09 18:35:31,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 729.2ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:35:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34174 states. [2021-07-09 18:35:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34174 to 23462. [2021-07-09 18:35:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 3.8782234346362046) internal successors, (90987), 23461 states have internal predecessors, (90987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 90987 transitions. [2021-07-09 18:35:32,202 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 90987 transitions. Word has length 28 [2021-07-09 18:35:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:32,202 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 90987 transitions. [2021-07-09 18:35:32,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 90987 transitions. [2021-07-09 18:35:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:32,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:32,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:32,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-07-09 18:35:32,457 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-07-09 18:35:32,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:32,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234365079] [2021-07-09 18:35:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:32,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:32,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234365079] [2021-07-09 18:35:32,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234365079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:32,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336861810] [2021-07-09 18:35:32,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:32,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:35:32,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:32,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:32,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:32,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336861810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:32,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:32,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:35:32,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237268971] [2021-07-09 18:35:32,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:35:32,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:35:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:35:32,605 INFO L87 Difference]: Start difference. First operand 23462 states and 90987 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:33,418 INFO L93 Difference]: Finished difference Result 33276 states and 124519 transitions. [2021-07-09 18:35:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:35:33,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:33,521 INFO L225 Difference]: With dead ends: 33276 [2021-07-09 18:35:33,521 INFO L226 Difference]: Without dead ends: 33272 [2021-07-09 18:35:33,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:35:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33272 states. [2021-07-09 18:35:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33272 to 23354. [2021-07-09 18:35:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23354 states, 23353 states have (on average 3.880657731340727) internal successors, (90625), 23353 states have internal predecessors, (90625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23354 states to 23354 states and 90625 transitions. [2021-07-09 18:35:34,361 INFO L78 Accepts]: Start accepts. Automaton has 23354 states and 90625 transitions. Word has length 28 [2021-07-09 18:35:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:34,361 INFO L482 AbstractCegarLoop]: Abstraction has 23354 states and 90625 transitions. [2021-07-09 18:35:34,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 23354 states and 90625 transitions. [2021-07-09 18:35:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:34,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:34,400 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:34,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4042,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:34,613 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-07-09 18:35:34,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:34,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698387982] [2021-07-09 18:35:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:34,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698387982] [2021-07-09 18:35:34,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698387982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741494044] [2021-07-09 18:35:34,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:34,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:35:34,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:34,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:35:34,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:35:34,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741494044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:34,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:34,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:35:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061317346] [2021-07-09 18:35:34,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:35:34,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:35:34,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:35:34,736 INFO L87 Difference]: Start difference. First operand 23354 states and 90625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:35,204 INFO L93 Difference]: Finished difference Result 29681 states and 111114 transitions. [2021-07-09 18:35:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:35:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:35,292 INFO L225 Difference]: With dead ends: 29681 [2021-07-09 18:35:35,292 INFO L226 Difference]: Without dead ends: 29681 [2021-07-09 18:35:35,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29681 states. [2021-07-09 18:35:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29681 to 23664. [2021-07-09 18:35:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23664 states, 23663 states have (on average 3.872628153657609) internal successors, (91638), 23663 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 91638 transitions. [2021-07-09 18:35:35,906 INFO L78 Accepts]: Start accepts. Automaton has 23664 states and 91638 transitions. Word has length 28 [2021-07-09 18:35:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:35,907 INFO L482 AbstractCegarLoop]: Abstraction has 23664 states and 91638 transitions. [2021-07-09 18:35:35,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 23664 states and 91638 transitions. [2021-07-09 18:35:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:35,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:35,947 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:36,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-07-09 18:35:36,162 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-07-09 18:35:36,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:36,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171714325] [2021-07-09 18:35:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:36,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171714325] [2021-07-09 18:35:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171714325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095239185] [2021-07-09 18:35:36,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:36,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:35:36,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095239185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:36,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:36,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:35:36,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512898333] [2021-07-09 18:35:36,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:35:36,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:35:36,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:35:36,281 INFO L87 Difference]: Start difference. First operand 23664 states and 91638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:37,235 INFO L93 Difference]: Finished difference Result 34438 states and 127402 transitions. [2021-07-09 18:35:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:35:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:37,342 INFO L225 Difference]: With dead ends: 34438 [2021-07-09 18:35:37,342 INFO L226 Difference]: Without dead ends: 34438 [2021-07-09 18:35:37,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:35:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34438 states. [2021-07-09 18:35:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34438 to 25439. [2021-07-09 18:35:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25439 states, 25438 states have (on average 3.8818696438399245) internal successors, (98747), 25438 states have internal predecessors, (98747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25439 states to 25439 states and 98747 transitions. [2021-07-09 18:35:38,250 INFO L78 Accepts]: Start accepts. Automaton has 25439 states and 98747 transitions. Word has length 28 [2021-07-09 18:35:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:38,250 INFO L482 AbstractCegarLoop]: Abstraction has 25439 states and 98747 transitions. [2021-07-09 18:35:38,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 25439 states and 98747 transitions. [2021-07-09 18:35:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:38,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:38,293 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:38,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-07-09 18:35:38,509 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-07-09 18:35:38,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:38,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523268952] [2021-07-09 18:35:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:38,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:38,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523268952] [2021-07-09 18:35:38,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523268952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:38,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57514121] [2021-07-09 18:35:38,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:38,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:35:38,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:38,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:35:38,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57514121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:38,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:38,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:35:38,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677889592] [2021-07-09 18:35:38,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:35:38,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:35:38,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:35:38,622 INFO L87 Difference]: Start difference. First operand 25439 states and 98747 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:39,526 INFO L93 Difference]: Finished difference Result 32691 states and 122893 transitions. [2021-07-09 18:35:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:35:39,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:39,623 INFO L225 Difference]: With dead ends: 32691 [2021-07-09 18:35:39,623 INFO L226 Difference]: Without dead ends: 32679 [2021-07-09 18:35:39,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:35:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32679 states. [2021-07-09 18:35:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32679 to 25599. [2021-07-09 18:35:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25599 states, 25598 states have (on average 3.8770607078678023) internal successors, (99245), 25598 states have internal predecessors, (99245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25599 states to 25599 states and 99245 transitions. [2021-07-09 18:35:40,496 INFO L78 Accepts]: Start accepts. Automaton has 25599 states and 99245 transitions. Word has length 28 [2021-07-09 18:35:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:40,496 INFO L482 AbstractCegarLoop]: Abstraction has 25599 states and 99245 transitions. [2021-07-09 18:35:40,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 25599 states and 99245 transitions. [2021-07-09 18:35:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:40,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:40,543 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:40,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-07-09 18:35:40,759 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:40,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-07-09 18:35:40,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:40,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881607851] [2021-07-09 18:35:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:40,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881607851] [2021-07-09 18:35:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881607851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906043289] [2021-07-09 18:35:40,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:40,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:35:40,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:35:40,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:40,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906043289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:40,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:40,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:35:40,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39912126] [2021-07-09 18:35:40,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:35:40,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:40,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:35:40,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:35:40,868 INFO L87 Difference]: Start difference. First operand 25599 states and 99245 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:41,162 INFO L93 Difference]: Finished difference Result 30159 states and 114821 transitions. [2021-07-09 18:35:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:35:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:41,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:41,398 INFO L225 Difference]: With dead ends: 30159 [2021-07-09 18:35:41,398 INFO L226 Difference]: Without dead ends: 30159 [2021-07-09 18:35:41,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30159 states. [2021-07-09 18:35:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30159 to 26806. [2021-07-09 18:35:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 3.8731952993844434) internal successors, (103821), 26805 states have internal predecessors, (103821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 103821 transitions. [2021-07-09 18:35:42,077 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 103821 transitions. Word has length 28 [2021-07-09 18:35:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:42,077 INFO L482 AbstractCegarLoop]: Abstraction has 26806 states and 103821 transitions. [2021-07-09 18:35:42,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 103821 transitions. [2021-07-09 18:35:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:42,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:42,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:42,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-07-09 18:35:42,343 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:42,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-07-09 18:35:42,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:42,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442536427] [2021-07-09 18:35:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:42,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:42,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442536427] [2021-07-09 18:35:42,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442536427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:42,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642128420] [2021-07-09 18:35:42,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:42,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:42,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:42,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:42,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642128420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:42,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:42,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:35:42,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871707754] [2021-07-09 18:35:42,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:35:42,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:35:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:35:42,463 INFO L87 Difference]: Start difference. First operand 26806 states and 103821 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:43,426 INFO L93 Difference]: Finished difference Result 34754 states and 129602 transitions. [2021-07-09 18:35:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:35:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:43,531 INFO L225 Difference]: With dead ends: 34754 [2021-07-09 18:35:43,531 INFO L226 Difference]: Without dead ends: 34754 [2021-07-09 18:35:43,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:35:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34754 states. [2021-07-09 18:35:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34754 to 28000. [2021-07-09 18:35:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28000 states, 27999 states have (on average 3.8443515839851425) internal successors, (107638), 27999 states have internal predecessors, (107638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 107638 transitions. [2021-07-09 18:35:44,538 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 107638 transitions. Word has length 28 [2021-07-09 18:35:44,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:44,539 INFO L482 AbstractCegarLoop]: Abstraction has 28000 states and 107638 transitions. [2021-07-09 18:35:44,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 107638 transitions. [2021-07-09 18:35:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:44,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:44,592 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:44,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:44,808 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:44,808 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-07-09 18:35:44,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:44,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309807844] [2021-07-09 18:35:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:44,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:44,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309807844] [2021-07-09 18:35:44,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309807844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:44,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178962460] [2021-07-09 18:35:44,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:44,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:35:44,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:44,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178962460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:44,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:44,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:35:44,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289382767] [2021-07-09 18:35:44,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:35:44,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:44,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:35:44,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:35:44,916 INFO L87 Difference]: Start difference. First operand 28000 states and 107638 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:45,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:45,662 INFO L93 Difference]: Finished difference Result 33849 states and 127203 transitions. [2021-07-09 18:35:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:35:45,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:45,762 INFO L225 Difference]: With dead ends: 33849 [2021-07-09 18:35:45,763 INFO L226 Difference]: Without dead ends: 33841 [2021-07-09 18:35:45,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:35:45,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33841 states. [2021-07-09 18:35:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33841 to 27806. [2021-07-09 18:35:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27806 states, 27805 states have (on average 3.8502787268476895) internal successors, (107057), 27805 states have internal predecessors, (107057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27806 states to 27806 states and 107057 transitions. [2021-07-09 18:35:46,621 INFO L78 Accepts]: Start accepts. Automaton has 27806 states and 107057 transitions. Word has length 28 [2021-07-09 18:35:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:46,621 INFO L482 AbstractCegarLoop]: Abstraction has 27806 states and 107057 transitions. [2021-07-09 18:35:46,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 27806 states and 107057 transitions. [2021-07-09 18:35:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:46,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:46,876 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:47,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:47,092 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-07-09 18:35:47,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:47,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544236842] [2021-07-09 18:35:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:47,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:47,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544236842] [2021-07-09 18:35:47,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544236842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:47,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479233147] [2021-07-09 18:35:47,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:47,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:35:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:47,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479233147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:47,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:47,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:35:47,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383197397] [2021-07-09 18:35:47,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:35:47,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:47,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:35:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:35:47,220 INFO L87 Difference]: Start difference. First operand 27806 states and 107057 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:48,018 INFO L93 Difference]: Finished difference Result 35673 states and 132779 transitions. [2021-07-09 18:35:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:35:48,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:48,340 INFO L225 Difference]: With dead ends: 35673 [2021-07-09 18:35:48,340 INFO L226 Difference]: Without dead ends: 35673 [2021-07-09 18:35:48,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:35:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35673 states. [2021-07-09 18:35:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35673 to 28844. [2021-07-09 18:35:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28844 states, 28843 states have (on average 3.827618486287834) internal successors, (110400), 28843 states have internal predecessors, (110400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28844 states to 28844 states and 110400 transitions. [2021-07-09 18:35:49,167 INFO L78 Accepts]: Start accepts. Automaton has 28844 states and 110400 transitions. Word has length 28 [2021-07-09 18:35:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:49,168 INFO L482 AbstractCegarLoop]: Abstraction has 28844 states and 110400 transitions. [2021-07-09 18:35:49,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 28844 states and 110400 transitions. [2021-07-09 18:35:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:49,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:49,220 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:49,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:49,436 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:49,436 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-07-09 18:35:49,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:49,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602692525] [2021-07-09 18:35:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:49,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:49,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602692525] [2021-07-09 18:35:49,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602692525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:49,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476982275] [2021-07-09 18:35:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:49,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:35:49,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:49,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476982275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:49,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:49,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:35:49,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908668544] [2021-07-09 18:35:49,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:35:49,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:49,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:35:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:35:49,535 INFO L87 Difference]: Start difference. First operand 28844 states and 110400 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:50,111 INFO L93 Difference]: Finished difference Result 35179 states and 133683 transitions. [2021-07-09 18:35:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:35:50,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:50,208 INFO L225 Difference]: With dead ends: 35179 [2021-07-09 18:35:50,208 INFO L226 Difference]: Without dead ends: 35166 [2021-07-09 18:35:50,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:35:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35166 states. [2021-07-09 18:35:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35166 to 33639. [2021-07-09 18:35:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33639 states, 33638 states have (on average 3.8427968369106367) internal successors, (129264), 33638 states have internal predecessors, (129264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33639 states to 33639 states and 129264 transitions. [2021-07-09 18:35:51,233 INFO L78 Accepts]: Start accepts. Automaton has 33639 states and 129264 transitions. Word has length 28 [2021-07-09 18:35:51,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:51,233 INFO L482 AbstractCegarLoop]: Abstraction has 33639 states and 129264 transitions. [2021-07-09 18:35:51,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:51,233 INFO L276 IsEmpty]: Start isEmpty. Operand 33639 states and 129264 transitions. [2021-07-09 18:35:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:51,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:51,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:51,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4050,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:51,508 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-07-09 18:35:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:51,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437751925] [2021-07-09 18:35:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:51,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437751925] [2021-07-09 18:35:51,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437751925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959036969] [2021-07-09 18:35:51,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:51,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:35:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:51,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:35:51,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:51,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959036969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:51,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:51,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:35:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492064786] [2021-07-09 18:35:51,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:35:51,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:35:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:35:51,611 INFO L87 Difference]: Start difference. First operand 33639 states and 129264 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:52,179 INFO L93 Difference]: Finished difference Result 36796 states and 139166 transitions. [2021-07-09 18:35:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:35:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:52,288 INFO L225 Difference]: With dead ends: 36796 [2021-07-09 18:35:52,288 INFO L226 Difference]: Without dead ends: 36796 [2021-07-09 18:35:52,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:35:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36796 states. [2021-07-09 18:35:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36796 to 33316. [2021-07-09 18:35:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33316 states, 33315 states have (on average 3.839021461803992) internal successors, (127897), 33315 states have internal predecessors, (127897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33316 states to 33316 states and 127897 transitions. [2021-07-09 18:35:53,301 INFO L78 Accepts]: Start accepts. Automaton has 33316 states and 127897 transitions. Word has length 28 [2021-07-09 18:35:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:53,301 INFO L482 AbstractCegarLoop]: Abstraction has 33316 states and 127897 transitions. [2021-07-09 18:35:53,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 33316 states and 127897 transitions. [2021-07-09 18:35:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:53,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:53,371 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:53,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-07-09 18:35:53,587 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:53,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-07-09 18:35:53,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:53,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534198052] [2021-07-09 18:35:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:53,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:53,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534198052] [2021-07-09 18:35:53,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534198052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:53,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806631400] [2021-07-09 18:35:53,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:53,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:35:53,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:53,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:53,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806631400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:53,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:53,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:35:53,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731739996] [2021-07-09 18:35:53,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:35:53,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:53,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:35:53,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:35:53,707 INFO L87 Difference]: Start difference. First operand 33316 states and 127897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:54,594 INFO L93 Difference]: Finished difference Result 39856 states and 149676 transitions. [2021-07-09 18:35:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:35:54,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:54,710 INFO L225 Difference]: With dead ends: 39856 [2021-07-09 18:35:54,710 INFO L226 Difference]: Without dead ends: 39848 [2021-07-09 18:35:54,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:35:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-07-09 18:35:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 33282. [2021-07-09 18:35:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33282 states, 33281 states have (on average 3.839427901805835) internal successors, (127780), 33281 states have internal predecessors, (127780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33282 states to 33282 states and 127780 transitions. [2021-07-09 18:35:55,626 INFO L78 Accepts]: Start accepts. Automaton has 33282 states and 127780 transitions. Word has length 28 [2021-07-09 18:35:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:55,626 INFO L482 AbstractCegarLoop]: Abstraction has 33282 states and 127780 transitions. [2021-07-09 18:35:55,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33282 states and 127780 transitions. [2021-07-09 18:35:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:56,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:56,063 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:56,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:56,263 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-07-09 18:35:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:56,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683824629] [2021-07-09 18:35:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:56,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:56,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683824629] [2021-07-09 18:35:56,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683824629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:56,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983367371] [2021-07-09 18:35:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:56,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:56,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:35:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:56,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983367371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:56,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:56,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:35:56,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735056006] [2021-07-09 18:35:56,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:35:56,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:56,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:35:56,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:35:56,369 INFO L87 Difference]: Start difference. First operand 33282 states and 127780 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:56,851 INFO L93 Difference]: Finished difference Result 36198 states and 137505 transitions. [2021-07-09 18:35:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:35:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:56,961 INFO L225 Difference]: With dead ends: 36198 [2021-07-09 18:35:56,961 INFO L226 Difference]: Without dead ends: 36198 [2021-07-09 18:35:56,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:35:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36198 states. [2021-07-09 18:35:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36198 to 33814. [2021-07-09 18:35:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 3.837695560878952) internal successors, (129764), 33813 states have internal predecessors, (129764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 129764 transitions. [2021-07-09 18:35:58,052 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 129764 transitions. Word has length 28 [2021-07-09 18:35:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:58,052 INFO L482 AbstractCegarLoop]: Abstraction has 33814 states and 129764 transitions. [2021-07-09 18:35:58,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 129764 transitions. [2021-07-09 18:35:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:35:58,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:58,111 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:58,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-07-09 18:35:58,326 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:58,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-07-09 18:35:58,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:58,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758251255] [2021-07-09 18:35:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:58,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:58,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758251255] [2021-07-09 18:35:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758251255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:58,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221891788] [2021-07-09 18:35:58,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:58,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:58,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:58,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:35:58,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:35:58,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221891788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:58,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:58,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:35:58,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82396760] [2021-07-09 18:35:58,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:35:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:35:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:35:58,438 INFO L87 Difference]: Start difference. First operand 33814 states and 129764 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:59,298 INFO L93 Difference]: Finished difference Result 40833 states and 153241 transitions. [2021-07-09 18:35:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:35:59,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:35:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:59,424 INFO L225 Difference]: With dead ends: 40833 [2021-07-09 18:35:59,424 INFO L226 Difference]: Without dead ends: 40809 [2021-07-09 18:35:59,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 471.3ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:35:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40809 states. [2021-07-09 18:36:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40809 to 33986. [2021-07-09 18:36:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33986 states, 33985 states have (on average 3.8339855818743565) internal successors, (130298), 33985 states have internal predecessors, (130298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33986 states to 33986 states and 130298 transitions. [2021-07-09 18:36:00,534 INFO L78 Accepts]: Start accepts. Automaton has 33986 states and 130298 transitions. Word has length 28 [2021-07-09 18:36:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:00,534 INFO L482 AbstractCegarLoop]: Abstraction has 33986 states and 130298 transitions. [2021-07-09 18:36:00,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 33986 states and 130298 transitions. [2021-07-09 18:36:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:00,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:00,603 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:00,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-07-09 18:36:00,819 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:00,820 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-07-09 18:36:00,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:00,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681202627] [2021-07-09 18:36:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:00,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:00,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681202627] [2021-07-09 18:36:00,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681202627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:00,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083677543] [2021-07-09 18:36:00,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:00,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:36:00,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:00,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:36:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:00,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083677543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:00,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:00,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 18:36:00,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310209043] [2021-07-09 18:36:00,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:36:00,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:00,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:36:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:36:00,925 INFO L87 Difference]: Start difference. First operand 33986 states and 130298 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:01,531 INFO L93 Difference]: Finished difference Result 36618 states and 138998 transitions. [2021-07-09 18:36:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:36:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:01,640 INFO L225 Difference]: With dead ends: 36618 [2021-07-09 18:36:01,641 INFO L226 Difference]: Without dead ends: 36618 [2021-07-09 18:36:01,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:36:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2021-07-09 18:36:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 33912. [2021-07-09 18:36:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33912 states, 33911 states have (on average 3.8348028663265605) internal successors, (130042), 33911 states have internal predecessors, (130042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33912 states to 33912 states and 130042 transitions. [2021-07-09 18:36:02,704 INFO L78 Accepts]: Start accepts. Automaton has 33912 states and 130042 transitions. Word has length 28 [2021-07-09 18:36:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:02,704 INFO L482 AbstractCegarLoop]: Abstraction has 33912 states and 130042 transitions. [2021-07-09 18:36:02,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 33912 states and 130042 transitions. [2021-07-09 18:36:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:02,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:02,766 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:02,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-07-09 18:36:02,981 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-07-09 18:36:02,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:02,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212908258] [2021-07-09 18:36:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:03,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:03,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212908258] [2021-07-09 18:36:03,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212908258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:03,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862761112] [2021-07-09 18:36:03,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:03,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862761112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:03,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:03,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:36:03,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407446585] [2021-07-09 18:36:03,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:36:03,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:36:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:36:03,095 INFO L87 Difference]: Start difference. First operand 33912 states and 130042 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:03,828 INFO L93 Difference]: Finished difference Result 40756 states and 152982 transitions. [2021-07-09 18:36:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:36:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:04,168 INFO L225 Difference]: With dead ends: 40756 [2021-07-09 18:36:04,168 INFO L226 Difference]: Without dead ends: 40716 [2021-07-09 18:36:04,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:36:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40716 states. [2021-07-09 18:36:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40716 to 34086. [2021-07-09 18:36:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34086 states, 34085 states have (on average 3.8309813701041513) internal successors, (130579), 34085 states have internal predecessors, (130579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34086 states to 34086 states and 130579 transitions. [2021-07-09 18:36:05,074 INFO L78 Accepts]: Start accepts. Automaton has 34086 states and 130579 transitions. Word has length 28 [2021-07-09 18:36:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:05,074 INFO L482 AbstractCegarLoop]: Abstraction has 34086 states and 130579 transitions. [2021-07-09 18:36:05,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 34086 states and 130579 transitions. [2021-07-09 18:36:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:05,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:05,404 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:05,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-07-09 18:36:05,619 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:05,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-07-09 18:36:05,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:05,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312654111] [2021-07-09 18:36:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:05,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:05,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312654111] [2021-07-09 18:36:05,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312654111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:05,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821687373] [2021-07-09 18:36:05,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:05,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:05,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:05,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:05,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:05,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821687373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:05,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:05,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:36:05,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436996405] [2021-07-09 18:36:05,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:36:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:36:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:36:05,802 INFO L87 Difference]: Start difference. First operand 34086 states and 130579 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:07,459 INFO L93 Difference]: Finished difference Result 76027 states and 281494 transitions. [2021-07-09 18:36:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:36:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:07,720 INFO L225 Difference]: With dead ends: 76027 [2021-07-09 18:36:07,720 INFO L226 Difference]: Without dead ends: 76027 [2021-07-09 18:36:07,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:36:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76027 states. [2021-07-09 18:36:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76027 to 43183. [2021-07-09 18:36:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43183 states, 43182 states have (on average 3.906581445972859) internal successors, (168694), 43182 states have internal predecessors, (168694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43183 states to 43183 states and 168694 transitions. [2021-07-09 18:36:09,694 INFO L78 Accepts]: Start accepts. Automaton has 43183 states and 168694 transitions. Word has length 28 [2021-07-09 18:36:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:09,694 INFO L482 AbstractCegarLoop]: Abstraction has 43183 states and 168694 transitions. [2021-07-09 18:36:09,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 43183 states and 168694 transitions. [2021-07-09 18:36:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:09,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:09,773 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:09,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-09 18:36:09,988 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:09,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-07-09 18:36:09,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:09,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162135545] [2021-07-09 18:36:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:10,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:10,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162135545] [2021-07-09 18:36:10,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162135545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:10,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294206543] [2021-07-09 18:36:10,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:10,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:36:10,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:10,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:10,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294206543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:10,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:10,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:36:10,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529968108] [2021-07-09 18:36:10,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:36:10,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:36:10,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:36:10,137 INFO L87 Difference]: Start difference. First operand 43183 states and 168694 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:12,085 INFO L93 Difference]: Finished difference Result 75388 states and 279801 transitions. [2021-07-09 18:36:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:36:12,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:12,377 INFO L225 Difference]: With dead ends: 75388 [2021-07-09 18:36:12,377 INFO L226 Difference]: Without dead ends: 75388 [2021-07-09 18:36:12,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 995.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:36:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75388 states. [2021-07-09 18:36:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75388 to 43180. [2021-07-09 18:36:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43180 states, 43179 states have (on average 3.906528636605757) internal successors, (168680), 43179 states have internal predecessors, (168680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43180 states to 43180 states and 168680 transitions. [2021-07-09 18:36:14,324 INFO L78 Accepts]: Start accepts. Automaton has 43180 states and 168680 transitions. Word has length 28 [2021-07-09 18:36:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:14,324 INFO L482 AbstractCegarLoop]: Abstraction has 43180 states and 168680 transitions. [2021-07-09 18:36:14,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 43180 states and 168680 transitions. [2021-07-09 18:36:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:14,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:14,402 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:14,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:14,617 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-07-09 18:36:14,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:14,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057086541] [2021-07-09 18:36:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:14,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:14,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057086541] [2021-07-09 18:36:14,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057086541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:14,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352693328] [2021-07-09 18:36:14,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:14,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:36:14,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:14,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:14,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:14,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352693328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:14,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:14,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:36:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016933109] [2021-07-09 18:36:14,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:36:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:14,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:36:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:36:14,752 INFO L87 Difference]: Start difference. First operand 43180 states and 168680 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:16,431 INFO L93 Difference]: Finished difference Result 69979 states and 261702 transitions. [2021-07-09 18:36:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:36:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:16,671 INFO L225 Difference]: With dead ends: 69979 [2021-07-09 18:36:16,671 INFO L226 Difference]: Without dead ends: 69979 [2021-07-09 18:36:16,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 818.3ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:36:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69979 states. [2021-07-09 18:36:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69979 to 43204. [2021-07-09 18:36:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9067657338610746) internal successors, (168784), 43203 states have internal predecessors, (168784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168784 transitions. [2021-07-09 18:36:18,495 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168784 transitions. Word has length 28 [2021-07-09 18:36:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:18,495 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168784 transitions. [2021-07-09 18:36:18,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168784 transitions. [2021-07-09 18:36:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:18,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:18,573 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:18,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:18,788 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:18,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-07-09 18:36:18,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:18,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590117656] [2021-07-09 18:36:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:18,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:18,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590117656] [2021-07-09 18:36:18,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590117656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:18,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626498455] [2021-07-09 18:36:18,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:18,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:36:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:18,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626498455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:18,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:18,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:36:18,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809122069] [2021-07-09 18:36:18,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:36:18,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:36:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:36:18,932 INFO L87 Difference]: Start difference. First operand 43204 states and 168784 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:20,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:20,317 INFO L93 Difference]: Finished difference Result 69094 states and 259411 transitions. [2021-07-09 18:36:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:36:20,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:20,768 INFO L225 Difference]: With dead ends: 69094 [2021-07-09 18:36:20,768 INFO L226 Difference]: Without dead ends: 69086 [2021-07-09 18:36:20,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:36:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69086 states. [2021-07-09 18:36:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69086 to 43204. [2021-07-09 18:36:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9066268546165777) internal successors, (168778), 43203 states have internal predecessors, (168778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168778 transitions. [2021-07-09 18:36:22,433 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168778 transitions. Word has length 28 [2021-07-09 18:36:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:22,433 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168778 transitions. [2021-07-09 18:36:22,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168778 transitions. [2021-07-09 18:36:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:22,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:22,813 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:23,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:23,028 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:23,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-07-09 18:36:23,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:23,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247052526] [2021-07-09 18:36:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:23,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:23,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247052526] [2021-07-09 18:36:23,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247052526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:23,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217584214] [2021-07-09 18:36:23,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:23,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:36:23,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:23,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:23,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:23,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217584214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:23,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:23,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:36:23,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659034675] [2021-07-09 18:36:23,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:36:23,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:23,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:36:23,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:36:23,189 INFO L87 Difference]: Start difference. First operand 43204 states and 168778 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:24,668 INFO L93 Difference]: Finished difference Result 68768 states and 258526 transitions. [2021-07-09 18:36:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:36:24,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:24,920 INFO L225 Difference]: With dead ends: 68768 [2021-07-09 18:36:24,920 INFO L226 Difference]: Without dead ends: 68768 [2021-07-09 18:36:24,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 601.3ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:36:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68768 states. [2021-07-09 18:36:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68768 to 43212. [2021-07-09 18:36:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.9066904260489226) internal successors, (168812), 43211 states have internal predecessors, (168812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168812 transitions. [2021-07-09 18:36:26,717 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168812 transitions. Word has length 28 [2021-07-09 18:36:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:26,717 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168812 transitions. [2021-07-09 18:36:26,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168812 transitions. [2021-07-09 18:36:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:26,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:26,805 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:27,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-07-09 18:36:27,016 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:27,016 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-07-09 18:36:27,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:27,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933292364] [2021-07-09 18:36:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:27,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:27,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933292364] [2021-07-09 18:36:27,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933292364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:27,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009249045] [2021-07-09 18:36:27,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:27,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:27,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009249045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:27,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:27,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:36:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649699381] [2021-07-09 18:36:27,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:36:27,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:36:27,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:36:27,148 INFO L87 Difference]: Start difference. First operand 43212 states and 168812 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:28,905 INFO L93 Difference]: Finished difference Result 68557 states and 258000 transitions. [2021-07-09 18:36:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:36:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:29,137 INFO L225 Difference]: With dead ends: 68557 [2021-07-09 18:36:29,137 INFO L226 Difference]: Without dead ends: 68549 [2021-07-09 18:36:29,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 514.9ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:36:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2021-07-09 18:36:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 43212. [2021-07-09 18:36:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.906644141538034) internal successors, (168810), 43211 states have internal predecessors, (168810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168810 transitions. [2021-07-09 18:36:31,096 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168810 transitions. Word has length 28 [2021-07-09 18:36:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:31,096 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168810 transitions. [2021-07-09 18:36:31,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168810 transitions. [2021-07-09 18:36:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:31,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:31,180 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:31,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:31,396 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-07-09 18:36:31,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:31,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741235276] [2021-07-09 18:36:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:31,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:31,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741235276] [2021-07-09 18:36:31,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741235276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:31,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875645754] [2021-07-09 18:36:31,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:31,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:31,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875645754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:31,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:31,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:36:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399490809] [2021-07-09 18:36:31,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:36:31,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:31,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:36:31,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:36:31,522 INFO L87 Difference]: Start difference. First operand 43212 states and 168810 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:33,063 INFO L93 Difference]: Finished difference Result 67982 states and 254698 transitions. [2021-07-09 18:36:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:36:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:33,306 INFO L225 Difference]: With dead ends: 67982 [2021-07-09 18:36:33,306 INFO L226 Difference]: Without dead ends: 67982 [2021-07-09 18:36:33,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 635.0ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:36:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67982 states. [2021-07-09 18:36:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67982 to 46442. [2021-07-09 18:36:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46442 states, 46441 states have (on average 3.9102086518378156) internal successors, (181594), 46441 states have internal predecessors, (181594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46442 states to 46442 states and 181594 transitions. [2021-07-09 18:36:35,210 INFO L78 Accepts]: Start accepts. Automaton has 46442 states and 181594 transitions. Word has length 28 [2021-07-09 18:36:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:35,210 INFO L482 AbstractCegarLoop]: Abstraction has 46442 states and 181594 transitions. [2021-07-09 18:36:35,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 46442 states and 181594 transitions. [2021-07-09 18:36:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:35,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:35,295 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:35,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-07-09 18:36:35,510 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-07-09 18:36:35,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:35,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851212552] [2021-07-09 18:36:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:35,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:35,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851212552] [2021-07-09 18:36:35,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851212552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:35,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341415609] [2021-07-09 18:36:35,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:35,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:36:35,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:35,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341415609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:35,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:35,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:36:35,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446663632] [2021-07-09 18:36:35,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:36:35,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:35,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:36:35,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:36:35,645 INFO L87 Difference]: Start difference. First operand 46442 states and 181594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:35,894 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2021-07-09 18:36:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:37,171 INFO L93 Difference]: Finished difference Result 67509 states and 253442 transitions. [2021-07-09 18:36:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:36:37,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:37,403 INFO L225 Difference]: With dead ends: 67509 [2021-07-09 18:36:37,403 INFO L226 Difference]: Without dead ends: 67501 [2021-07-09 18:36:37,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 655.1ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:36:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67501 states. [2021-07-09 18:36:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67501 to 46136. [2021-07-09 18:36:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46136 states, 46135 states have (on average 3.9156172103608973) internal successors, (180647), 46135 states have internal predecessors, (180647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46136 states to 46136 states and 180647 transitions. [2021-07-09 18:36:39,305 INFO L78 Accepts]: Start accepts. Automaton has 46136 states and 180647 transitions. Word has length 28 [2021-07-09 18:36:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:39,305 INFO L482 AbstractCegarLoop]: Abstraction has 46136 states and 180647 transitions. [2021-07-09 18:36:39,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 46136 states and 180647 transitions. [2021-07-09 18:36:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:39,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:39,398 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:39,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-07-09 18:36:39,614 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:39,615 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-07-09 18:36:39,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:39,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037013644] [2021-07-09 18:36:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:39,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:39,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037013644] [2021-07-09 18:36:39,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037013644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:39,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44261310] [2021-07-09 18:36:39,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:39,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:36:39,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:39,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:39,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:39,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44261310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:39,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:39,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:36:39,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095788184] [2021-07-09 18:36:39,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:36:39,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:39,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:36:39,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:36:39,735 INFO L87 Difference]: Start difference. First operand 46136 states and 180647 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:40,788 INFO L93 Difference]: Finished difference Result 65985 states and 249225 transitions. [2021-07-09 18:36:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:36:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:41,023 INFO L225 Difference]: With dead ends: 65985 [2021-07-09 18:36:41,023 INFO L226 Difference]: Without dead ends: 65961 [2021-07-09 18:36:41,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:36:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65961 states. [2021-07-09 18:36:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65961 to 46032. [2021-07-09 18:36:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46032 states, 46031 states have (on average 3.915600356281636) internal successors, (180239), 46031 states have internal predecessors, (180239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46032 states to 46032 states and 180239 transitions. [2021-07-09 18:36:42,957 INFO L78 Accepts]: Start accepts. Automaton has 46032 states and 180239 transitions. Word has length 28 [2021-07-09 18:36:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:42,957 INFO L482 AbstractCegarLoop]: Abstraction has 46032 states and 180239 transitions. [2021-07-09 18:36:42,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 46032 states and 180239 transitions. [2021-07-09 18:36:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:43,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:43,040 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:43,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4065,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:43,256 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-07-09 18:36:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:43,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716332309] [2021-07-09 18:36:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:36:43,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:43,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716332309] [2021-07-09 18:36:43,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716332309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:43,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846297706] [2021-07-09 18:36:43,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:43,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:36:43,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:43,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:43,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846297706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:43,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:43,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:36:43,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186162130] [2021-07-09 18:36:43,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:36:43,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:43,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:36:43,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:36:43,410 INFO L87 Difference]: Start difference. First operand 46032 states and 180239 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:43,764 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 18:36:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:45,246 INFO L93 Difference]: Finished difference Result 67202 states and 252555 transitions. [2021-07-09 18:36:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:36:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:45,479 INFO L225 Difference]: With dead ends: 67202 [2021-07-09 18:36:45,480 INFO L226 Difference]: Without dead ends: 67202 [2021-07-09 18:36:45,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 974.4ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:36:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67202 states. [2021-07-09 18:36:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67202 to 46128. [2021-07-09 18:36:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46128 states, 46127 states have (on average 3.9142584603377633) internal successors, (180553), 46127 states have internal predecessors, (180553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46128 states to 46128 states and 180553 transitions. [2021-07-09 18:36:47,434 INFO L78 Accepts]: Start accepts. Automaton has 46128 states and 180553 transitions. Word has length 28 [2021-07-09 18:36:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:47,434 INFO L482 AbstractCegarLoop]: Abstraction has 46128 states and 180553 transitions. [2021-07-09 18:36:47,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 46128 states and 180553 transitions. [2021-07-09 18:36:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:47,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:47,519 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:47,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-09 18:36:47,734 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-07-09 18:36:47,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:47,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420279607] [2021-07-09 18:36:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:36:47,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:47,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420279607] [2021-07-09 18:36:47,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420279607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:47,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776995165] [2021-07-09 18:36:47,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:47,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:36:47,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:47,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:47,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776995165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:47,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:47,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:36:47,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59139836] [2021-07-09 18:36:47,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:36:47,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:36:47,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:36:47,889 INFO L87 Difference]: Start difference. First operand 46128 states and 180553 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:49,268 INFO L93 Difference]: Finished difference Result 66883 states and 251651 transitions. [2021-07-09 18:36:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:36:49,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:49,703 INFO L225 Difference]: With dead ends: 66883 [2021-07-09 18:36:49,704 INFO L226 Difference]: Without dead ends: 66875 [2021-07-09 18:36:49,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:36:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66875 states. [2021-07-09 18:36:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66875 to 46060. [2021-07-09 18:36:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46060 states, 46059 states have (on average 3.9154345513363293) internal successors, (180341), 46059 states have internal predecessors, (180341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46060 states to 46060 states and 180341 transitions. [2021-07-09 18:36:51,353 INFO L78 Accepts]: Start accepts. Automaton has 46060 states and 180341 transitions. Word has length 28 [2021-07-09 18:36:51,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:51,354 INFO L482 AbstractCegarLoop]: Abstraction has 46060 states and 180341 transitions. [2021-07-09 18:36:51,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 46060 states and 180341 transitions. [2021-07-09 18:36:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:51,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:51,437 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:51,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-09 18:36:51,653 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-07-09 18:36:51,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:51,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109228032] [2021-07-09 18:36:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:36:51,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:51,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109228032] [2021-07-09 18:36:51,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109228032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:51,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091594864] [2021-07-09 18:36:51,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:51,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:52,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091594864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:52,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:52,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:36:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156414853] [2021-07-09 18:36:52,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:36:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:52,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:36:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:36:52,156 INFO L87 Difference]: Start difference. First operand 46060 states and 180341 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:53,398 INFO L93 Difference]: Finished difference Result 65614 states and 248140 transitions. [2021-07-09 18:36:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:36:53,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:53,632 INFO L225 Difference]: With dead ends: 65614 [2021-07-09 18:36:53,632 INFO L226 Difference]: Without dead ends: 65590 [2021-07-09 18:36:53,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:36:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65590 states. [2021-07-09 18:36:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65590 to 46036. [2021-07-09 18:36:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46036 states, 46035 states have (on average 3.915564244596503) internal successors, (180253), 46035 states have internal predecessors, (180253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46036 states to 46036 states and 180253 transitions. [2021-07-09 18:36:55,653 INFO L78 Accepts]: Start accepts. Automaton has 46036 states and 180253 transitions. Word has length 28 [2021-07-09 18:36:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:55,654 INFO L482 AbstractCegarLoop]: Abstraction has 46036 states and 180253 transitions. [2021-07-09 18:36:55,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 46036 states and 180253 transitions. [2021-07-09 18:36:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:36:55,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:55,738 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:55,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-07-09 18:36:55,954 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-07-09 18:36:55,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:55,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960507649] [2021-07-09 18:36:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:55,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:55,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960507649] [2021-07-09 18:36:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960507649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:55,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828079604] [2021-07-09 18:36:55,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:56,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:56,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:36:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:56,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828079604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:56,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:56,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:36:56,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408750998] [2021-07-09 18:36:56,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:36:56,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:36:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:36:56,085 INFO L87 Difference]: Start difference. First operand 46036 states and 180253 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:57,923 INFO L93 Difference]: Finished difference Result 68913 states and 257576 transitions. [2021-07-09 18:36:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:36:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:36:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:58,334 INFO L225 Difference]: With dead ends: 68913 [2021-07-09 18:36:58,334 INFO L226 Difference]: Without dead ends: 68913 [2021-07-09 18:36:58,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 894.3ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:36:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68913 states. [2021-07-09 18:37:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68913 to 50828. [2021-07-09 18:37:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50828 states, 50827 states have (on average 3.8652881342593504) internal successors, (196461), 50827 states have internal predecessors, (196461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 196461 transitions. [2021-07-09 18:37:00,452 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 196461 transitions. Word has length 28 [2021-07-09 18:37:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:00,452 INFO L482 AbstractCegarLoop]: Abstraction has 50828 states and 196461 transitions. [2021-07-09 18:37:00,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 196461 transitions. [2021-07-09 18:37:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:00,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:00,548 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:00,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:00,757 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-07-09 18:37:00,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:00,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534804808] [2021-07-09 18:37:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:00,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:00,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534804808] [2021-07-09 18:37:00,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534804808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:00,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255641730] [2021-07-09 18:37:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:00,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:37:00,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:00,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:00,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255641730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:00,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:00,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:37:00,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323524146] [2021-07-09 18:37:00,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:37:00,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:00,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:37:00,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:00,887 INFO L87 Difference]: Start difference. First operand 50828 states and 196461 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:01,760 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 18:37:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:02,566 INFO L93 Difference]: Finished difference Result 68143 states and 255462 transitions. [2021-07-09 18:37:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:37:02,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:03,147 INFO L225 Difference]: With dead ends: 68143 [2021-07-09 18:37:03,147 INFO L226 Difference]: Without dead ends: 68135 [2021-07-09 18:37:03,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 993.0ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:37:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68135 states. [2021-07-09 18:37:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68135 to 49664. [2021-07-09 18:37:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49664 states, 49663 states have (on average 3.8827900046312145) internal successors, (192831), 49663 states have internal predecessors, (192831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49664 states to 49664 states and 192831 transitions. [2021-07-09 18:37:05,241 INFO L78 Accepts]: Start accepts. Automaton has 49664 states and 192831 transitions. Word has length 28 [2021-07-09 18:37:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:05,242 INFO L482 AbstractCegarLoop]: Abstraction has 49664 states and 192831 transitions. [2021-07-09 18:37:05,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 49664 states and 192831 transitions. [2021-07-09 18:37:05,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:05,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:05,361 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:05,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-07-09 18:37:05,577 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-07-09 18:37:05,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:05,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104066584] [2021-07-09 18:37:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:05,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104066584] [2021-07-09 18:37:05,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104066584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093731583] [2021-07-09 18:37:05,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:05,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:05,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:05,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:05,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093731583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:05,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:05,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:37:05,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171817584] [2021-07-09 18:37:05,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:37:05,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:05,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:37:05,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:05,706 INFO L87 Difference]: Start difference. First operand 49664 states and 192831 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:07,039 INFO L93 Difference]: Finished difference Result 66443 states and 250710 transitions. [2021-07-09 18:37:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:37:07,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:07,273 INFO L225 Difference]: With dead ends: 66443 [2021-07-09 18:37:07,273 INFO L226 Difference]: Without dead ends: 66419 [2021-07-09 18:37:07,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 542.7ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:37:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66419 states. [2021-07-09 18:37:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66419 to 49644. [2021-07-09 18:37:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49644 states, 49643 states have (on average 3.8810507020123683) internal successors, (192667), 49643 states have internal predecessors, (192667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49644 states to 49644 states and 192667 transitions. [2021-07-09 18:37:09,339 INFO L78 Accepts]: Start accepts. Automaton has 49644 states and 192667 transitions. Word has length 28 [2021-07-09 18:37:09,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:09,339 INFO L482 AbstractCegarLoop]: Abstraction has 49644 states and 192667 transitions. [2021-07-09 18:37:09,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 49644 states and 192667 transitions. [2021-07-09 18:37:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:09,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:09,433 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:09,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:09,649 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-07-09 18:37:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:09,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6916553] [2021-07-09 18:37:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:09,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6916553] [2021-07-09 18:37:09,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6916553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716962616] [2021-07-09 18:37:09,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:09,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:37:09,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:09,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:09,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716962616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:09,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:09,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:37:09,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485007575] [2021-07-09 18:37:09,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:37:09,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:37:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:37:09,775 INFO L87 Difference]: Start difference. First operand 49644 states and 192667 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:11,660 INFO L93 Difference]: Finished difference Result 67813 states and 254591 transitions. [2021-07-09 18:37:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:37:11,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:11,900 INFO L225 Difference]: With dead ends: 67813 [2021-07-09 18:37:11,900 INFO L226 Difference]: Without dead ends: 67773 [2021-07-09 18:37:11,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 583.8ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:37:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67773 states. [2021-07-09 18:37:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67773 to 49798. [2021-07-09 18:37:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49798 states, 49797 states have (on average 3.880394401269153) internal successors, (193232), 49797 states have internal predecessors, (193232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 193232 transitions. [2021-07-09 18:37:13,817 INFO L78 Accepts]: Start accepts. Automaton has 49798 states and 193232 transitions. Word has length 28 [2021-07-09 18:37:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:13,817 INFO L482 AbstractCegarLoop]: Abstraction has 49798 states and 193232 transitions. [2021-07-09 18:37:13,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 49798 states and 193232 transitions. [2021-07-09 18:37:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:13,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:13,908 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:14,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-07-09 18:37:14,123 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:14,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-07-09 18:37:14,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:14,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622316097] [2021-07-09 18:37:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:14,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:14,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622316097] [2021-07-09 18:37:14,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622316097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:14,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140440956] [2021-07-09 18:37:14,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:14,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:37:14,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140440956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:14,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:14,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:37:14,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279507930] [2021-07-09 18:37:14,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:14,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:14,294 INFO L87 Difference]: Start difference. First operand 49798 states and 193232 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:15,009 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-09 18:37:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:16,372 INFO L93 Difference]: Finished difference Result 66932 states and 251929 transitions. [2021-07-09 18:37:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:37:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:16,611 INFO L225 Difference]: With dead ends: 66932 [2021-07-09 18:37:16,611 INFO L226 Difference]: Without dead ends: 66932 [2021-07-09 18:37:16,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1189.8ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:37:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66932 states. [2021-07-09 18:37:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66932 to 50703. [2021-07-09 18:37:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50703 states, 50702 states have (on average 3.871701313557651) internal successors, (196303), 50702 states have internal predecessors, (196303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50703 states to 50703 states and 196303 transitions. [2021-07-09 18:37:18,737 INFO L78 Accepts]: Start accepts. Automaton has 50703 states and 196303 transitions. Word has length 28 [2021-07-09 18:37:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:18,737 INFO L482 AbstractCegarLoop]: Abstraction has 50703 states and 196303 transitions. [2021-07-09 18:37:18,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 50703 states and 196303 transitions. [2021-07-09 18:37:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:18,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:18,829 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:19,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:19,045 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-07-09 18:37:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:19,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737821801] [2021-07-09 18:37:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:19,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:19,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737821801] [2021-07-09 18:37:19,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737821801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:19,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165199061] [2021-07-09 18:37:19,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:19,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165199061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:19,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:19,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:37:19,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259161304] [2021-07-09 18:37:19,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:19,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:19,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:19,186 INFO L87 Difference]: Start difference. First operand 50703 states and 196303 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:19,816 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-07-09 18:37:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:20,783 INFO L93 Difference]: Finished difference Result 66428 states and 250518 transitions. [2021-07-09 18:37:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:37:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:21,037 INFO L225 Difference]: With dead ends: 66428 [2021-07-09 18:37:21,037 INFO L226 Difference]: Without dead ends: 66420 [2021-07-09 18:37:21,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:37:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66420 states. [2021-07-09 18:37:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66420 to 50627. [2021-07-09 18:37:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.8728518942835697) internal successors, (196067), 50626 states have internal predecessors, (196067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 196067 transitions. [2021-07-09 18:37:23,214 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 196067 transitions. Word has length 28 [2021-07-09 18:37:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:23,214 INFO L482 AbstractCegarLoop]: Abstraction has 50627 states and 196067 transitions. [2021-07-09 18:37:23,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 196067 transitions. [2021-07-09 18:37:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:23,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:23,307 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:23,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-07-09 18:37:23,520 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:23,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-07-09 18:37:23,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:23,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969975171] [2021-07-09 18:37:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:23,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:23,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969975171] [2021-07-09 18:37:23,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969975171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:23,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676455328] [2021-07-09 18:37:23,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:23,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:23,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676455328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:23,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:23,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:37:23,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77215989] [2021-07-09 18:37:23,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:37:23,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:23,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:37:23,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:37:23,666 INFO L87 Difference]: Start difference. First operand 50627 states and 196067 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:25,102 INFO L93 Difference]: Finished difference Result 65905 states and 249272 transitions. [2021-07-09 18:37:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:37:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:25,346 INFO L225 Difference]: With dead ends: 65905 [2021-07-09 18:37:25,346 INFO L226 Difference]: Without dead ends: 65881 [2021-07-09 18:37:25,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:37:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65881 states. [2021-07-09 18:37:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65881 to 50613. [2021-07-09 18:37:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50613 states, 50612 states have (on average 3.872836481466846) internal successors, (196012), 50612 states have internal predecessors, (196012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50613 states to 50613 states and 196012 transitions. [2021-07-09 18:37:27,256 INFO L78 Accepts]: Start accepts. Automaton has 50613 states and 196012 transitions. Word has length 28 [2021-07-09 18:37:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:27,256 INFO L482 AbstractCegarLoop]: Abstraction has 50613 states and 196012 transitions. [2021-07-09 18:37:27,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 50613 states and 196012 transitions. [2021-07-09 18:37:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:27,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:27,637 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:27,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4075,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:27,852 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-07-09 18:37:27,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:27,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632520421] [2021-07-09 18:37:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:27,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:27,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632520421] [2021-07-09 18:37:27,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632520421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:27,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153138077] [2021-07-09 18:37:27,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:27,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:37:27,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:27,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153138077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:27,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:27,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:37:27,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344350155] [2021-07-09 18:37:27,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:37:27,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:27,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:37:27,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:37:27,997 INFO L87 Difference]: Start difference. First operand 50613 states and 196012 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:29,389 INFO L93 Difference]: Finished difference Result 65687 states and 248579 transitions. [2021-07-09 18:37:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:37:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:29,636 INFO L225 Difference]: With dead ends: 65687 [2021-07-09 18:37:29,637 INFO L226 Difference]: Without dead ends: 65647 [2021-07-09 18:37:29,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:37:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65647 states. [2021-07-09 18:37:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65647 to 50962. [2021-07-09 18:37:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 3.874354898844214) internal successors, (197441), 50961 states have internal predecessors, (197441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 197441 transitions. [2021-07-09 18:37:31,710 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 197441 transitions. Word has length 28 [2021-07-09 18:37:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:31,710 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 197441 transitions. [2021-07-09 18:37:31,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 197441 transitions. [2021-07-09 18:37:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:31,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:31,808 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:32,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-09 18:37:32,022 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:32,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-07-09 18:37:32,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:32,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625070985] [2021-07-09 18:37:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:32,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:32,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625070985] [2021-07-09 18:37:32,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625070985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:32,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320068678] [2021-07-09 18:37:32,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:32,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:32,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:32,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320068678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:32,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:32,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:37:32,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116687645] [2021-07-09 18:37:32,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:37:32,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:32,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:37:32,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:37:32,173 INFO L87 Difference]: Start difference. First operand 50962 states and 197441 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:34,168 INFO L93 Difference]: Finished difference Result 79769 states and 298419 transitions. [2021-07-09 18:37:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:37:34,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:34,455 INFO L225 Difference]: With dead ends: 79769 [2021-07-09 18:37:34,455 INFO L226 Difference]: Without dead ends: 79769 [2021-07-09 18:37:34,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 961.2ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:37:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79769 states. [2021-07-09 18:37:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79769 to 52128. [2021-07-09 18:37:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52128 states, 52127 states have (on average 3.8865846873980856) internal successors, (202596), 52127 states have internal predecessors, (202596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52128 states to 52128 states and 202596 transitions. [2021-07-09 18:37:36,656 INFO L78 Accepts]: Start accepts. Automaton has 52128 states and 202596 transitions. Word has length 28 [2021-07-09 18:37:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:36,656 INFO L482 AbstractCegarLoop]: Abstraction has 52128 states and 202596 transitions. [2021-07-09 18:37:36,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 52128 states and 202596 transitions. [2021-07-09 18:37:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:36,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:36,756 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:36,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-07-09 18:37:36,971 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-07-09 18:37:36,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:36,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530508496] [2021-07-09 18:37:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:37,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:37,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530508496] [2021-07-09 18:37:37,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530508496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:37,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654602036] [2021-07-09 18:37:37,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:37,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:37:37,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:37,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654602036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:37,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:37,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:37:37,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157418122] [2021-07-09 18:37:37,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:37:37,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:37,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:37:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:37:37,125 INFO L87 Difference]: Start difference. First operand 52128 states and 202596 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,778 INFO L93 Difference]: Finished difference Result 72910 states and 276752 transitions. [2021-07-09 18:37:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:37:38,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:39,068 INFO L225 Difference]: With dead ends: 72910 [2021-07-09 18:37:39,068 INFO L226 Difference]: Without dead ends: 72910 [2021-07-09 18:37:39,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:37:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72910 states. [2021-07-09 18:37:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72910 to 52158. [2021-07-09 18:37:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52158 states, 52157 states have (on average 3.886400674885442) internal successors, (202703), 52157 states have internal predecessors, (202703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52158 states to 52158 states and 202703 transitions. [2021-07-09 18:37:41,055 INFO L78 Accepts]: Start accepts. Automaton has 52158 states and 202703 transitions. Word has length 28 [2021-07-09 18:37:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:41,056 INFO L482 AbstractCegarLoop]: Abstraction has 52158 states and 202703 transitions. [2021-07-09 18:37:41,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 52158 states and 202703 transitions. [2021-07-09 18:37:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:41,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:41,159 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:41,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-09 18:37:41,375 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:41,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-07-09 18:37:41,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:41,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083875836] [2021-07-09 18:37:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:41,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:41,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083875836] [2021-07-09 18:37:41,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083875836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:41,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715051354] [2021-07-09 18:37:41,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:41,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:37:41,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:41,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:41,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715051354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:41,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:41,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:37:41,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136257519] [2021-07-09 18:37:41,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:41,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:41,540 INFO L87 Difference]: Start difference. First operand 52158 states and 202703 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:43,568 INFO L93 Difference]: Finished difference Result 73768 states and 279188 transitions. [2021-07-09 18:37:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:37:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:43,838 INFO L225 Difference]: With dead ends: 73768 [2021-07-09 18:37:43,838 INFO L226 Difference]: Without dead ends: 73768 [2021-07-09 18:37:43,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1129.5ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:37:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73768 states. [2021-07-09 18:37:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73768 to 52422. [2021-07-09 18:37:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52422 states, 52421 states have (on average 3.8831956658591023) internal successors, (203561), 52421 states have internal predecessors, (203561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52422 states to 52422 states and 203561 transitions. [2021-07-09 18:37:45,848 INFO L78 Accepts]: Start accepts. Automaton has 52422 states and 203561 transitions. Word has length 28 [2021-07-09 18:37:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:45,848 INFO L482 AbstractCegarLoop]: Abstraction has 52422 states and 203561 transitions. [2021-07-09 18:37:45,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,848 INFO L276 IsEmpty]: Start isEmpty. Operand 52422 states and 203561 transitions. [2021-07-09 18:37:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:46,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:46,204 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:46,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-07-09 18:37:46,420 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-07-09 18:37:46,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:46,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517982264] [2021-07-09 18:37:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:46,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:46,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517982264] [2021-07-09 18:37:46,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517982264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:46,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240817295] [2021-07-09 18:37:46,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:46,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:46,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:46,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240817295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:46,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:46,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:37:46,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047664784] [2021-07-09 18:37:46,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:46,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:46,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:46,581 INFO L87 Difference]: Start difference. First operand 52422 states and 203561 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:48,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:48,352 INFO L93 Difference]: Finished difference Result 72980 states and 276953 transitions. [2021-07-09 18:37:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:37:48,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:48,625 INFO L225 Difference]: With dead ends: 72980 [2021-07-09 18:37:48,626 INFO L226 Difference]: Without dead ends: 72976 [2021-07-09 18:37:48,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 779.3ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:37:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72976 states. [2021-07-09 18:37:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72976 to 52058. [2021-07-09 18:37:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52058 states, 52057 states have (on average 3.8866050675221393) internal successors, (202325), 52057 states have internal predecessors, (202325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52058 states to 52058 states and 202325 transitions. [2021-07-09 18:37:50,754 INFO L78 Accepts]: Start accepts. Automaton has 52058 states and 202325 transitions. Word has length 28 [2021-07-09 18:37:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:50,754 INFO L482 AbstractCegarLoop]: Abstraction has 52058 states and 202325 transitions. [2021-07-09 18:37:50,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 52058 states and 202325 transitions. [2021-07-09 18:37:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:51,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:51,213 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:51,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-07-09 18:37:51,429 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-07-09 18:37:51,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:51,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943800632] [2021-07-09 18:37:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:51,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:51,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943800632] [2021-07-09 18:37:51,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943800632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:51,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916928847] [2021-07-09 18:37:51,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:51,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:51,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916928847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:51,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:51,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:37:51,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595881615] [2021-07-09 18:37:51,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:37:51,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:51,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:37:51,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:37:51,580 INFO L87 Difference]: Start difference. First operand 52058 states and 202325 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:53,057 INFO L93 Difference]: Finished difference Result 66943 states and 255942 transitions. [2021-07-09 18:37:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:37:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:53,366 INFO L225 Difference]: With dead ends: 66943 [2021-07-09 18:37:53,367 INFO L226 Difference]: Without dead ends: 66943 [2021-07-09 18:37:53,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:37:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66943 states. [2021-07-09 18:37:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66943 to 52074. [2021-07-09 18:37:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52074 states, 52073 states have (on average 3.8882530294010333) internal successors, (202473), 52073 states have internal predecessors, (202473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52074 states to 52074 states and 202473 transitions. [2021-07-09 18:37:55,399 INFO L78 Accepts]: Start accepts. Automaton has 52074 states and 202473 transitions. Word has length 28 [2021-07-09 18:37:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:55,400 INFO L482 AbstractCegarLoop]: Abstraction has 52074 states and 202473 transitions. [2021-07-09 18:37:55,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 52074 states and 202473 transitions. [2021-07-09 18:37:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:55,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:55,492 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:55,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:55,703 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:55,704 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-07-09 18:37:55,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:55,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701560207] [2021-07-09 18:37:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:55,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701560207] [2021-07-09 18:37:55,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701560207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408752430] [2021-07-09 18:37:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:55,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:37:55,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408752430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:55,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:37:55,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548652358] [2021-07-09 18:37:55,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:37:55,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:55,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:37:55,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:37:55,849 INFO L87 Difference]: Start difference. First operand 52074 states and 202473 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:57,061 INFO L93 Difference]: Finished difference Result 66257 states and 254067 transitions. [2021-07-09 18:37:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:37:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:37:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:57,306 INFO L225 Difference]: With dead ends: 66257 [2021-07-09 18:37:57,306 INFO L226 Difference]: Without dead ends: 66245 [2021-07-09 18:37:57,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:37:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66245 states. [2021-07-09 18:37:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66245 to 52008. [2021-07-09 18:37:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52008 states, 52007 states have (on average 3.889284134828004) internal successors, (202270), 52007 states have internal predecessors, (202270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52008 states to 52008 states and 202270 transitions. [2021-07-09 18:37:59,227 INFO L78 Accepts]: Start accepts. Automaton has 52008 states and 202270 transitions. Word has length 28 [2021-07-09 18:37:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:59,227 INFO L482 AbstractCegarLoop]: Abstraction has 52008 states and 202270 transitions. [2021-07-09 18:37:59,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52008 states and 202270 transitions. [2021-07-09 18:37:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:37:59,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:59,318 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:59,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-07-09 18:37:59,533 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-07-09 18:37:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:59,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387012115] [2021-07-09 18:37:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:59,776 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 18:37:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:59,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387012115] [2021-07-09 18:37:59,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387012115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079412233] [2021-07-09 18:37:59,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:59,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:59,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:59,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:37:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079412233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:59,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:37:59,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510864148] [2021-07-09 18:37:59,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:37:59,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:59,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:37:59,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:37:59,941 INFO L87 Difference]: Start difference. First operand 52008 states and 202270 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:00,737 INFO L93 Difference]: Finished difference Result 56548 states and 217322 transitions. [2021-07-09 18:38:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:38:00,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:01,231 INFO L225 Difference]: With dead ends: 56548 [2021-07-09 18:38:01,231 INFO L226 Difference]: Without dead ends: 56548 [2021-07-09 18:38:01,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:38:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56548 states. [2021-07-09 18:38:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56548 to 52216. [2021-07-09 18:38:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52216 states, 52215 states have (on average 3.8870439528871015) internal successors, (202962), 52215 states have internal predecessors, (202962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52216 states to 52216 states and 202962 transitions. [2021-07-09 18:38:02,787 INFO L78 Accepts]: Start accepts. Automaton has 52216 states and 202962 transitions. Word has length 28 [2021-07-09 18:38:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:02,787 INFO L482 AbstractCegarLoop]: Abstraction has 52216 states and 202962 transitions. [2021-07-09 18:38:02,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 52216 states and 202962 transitions. [2021-07-09 18:38:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:03,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:03,142 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:03,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4083,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:03,342 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:03,343 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-07-09 18:38:03,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:03,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362346096] [2021-07-09 18:38:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:03,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362346096] [2021-07-09 18:38:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362346096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566200480] [2021-07-09 18:38:03,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:03,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:38:03,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:38:03,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:03,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566200480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:03,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:03,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:38:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835398673] [2021-07-09 18:38:03,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:38:03,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:03,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:38:03,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:38:03,479 INFO L87 Difference]: Start difference. First operand 52216 states and 202962 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:04,106 INFO L93 Difference]: Finished difference Result 56395 states and 216924 transitions. [2021-07-09 18:38:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:04,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:04,563 INFO L225 Difference]: With dead ends: 56395 [2021-07-09 18:38:04,563 INFO L226 Difference]: Without dead ends: 56391 [2021-07-09 18:38:04,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:38:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56391 states. [2021-07-09 18:38:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56391 to 52156. [2021-07-09 18:38:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52156 states, 52155 states have (on average 3.887834339948231) internal successors, (202770), 52155 states have internal predecessors, (202770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52156 states to 52156 states and 202770 transitions. [2021-07-09 18:38:06,219 INFO L78 Accepts]: Start accepts. Automaton has 52156 states and 202770 transitions. Word has length 28 [2021-07-09 18:38:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:06,219 INFO L482 AbstractCegarLoop]: Abstraction has 52156 states and 202770 transitions. [2021-07-09 18:38:06,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 52156 states and 202770 transitions. [2021-07-09 18:38:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:06,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:06,321 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:06,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-07-09 18:38:06,534 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:06,534 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 80 times [2021-07-09 18:38:06,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:06,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780908745] [2021-07-09 18:38:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:06,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:06,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780908745] [2021-07-09 18:38:06,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780908745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:06,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227685440] [2021-07-09 18:38:06,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:06,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:06,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:06,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:38:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:06,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227685440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:06,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:06,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 18:38:06,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953504456] [2021-07-09 18:38:06,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:38:06,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:38:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:38:06,902 INFO L87 Difference]: Start difference. First operand 52156 states and 202770 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:07,545 INFO L93 Difference]: Finished difference Result 56442 states and 217026 transitions. [2021-07-09 18:38:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:38:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:07,950 INFO L225 Difference]: With dead ends: 56442 [2021-07-09 18:38:07,950 INFO L226 Difference]: Without dead ends: 56442 [2021-07-09 18:38:07,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:38:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56442 states. [2021-07-09 18:38:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56442 to 52260. [2021-07-09 18:38:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52260 states, 52259 states have (on average 3.88629709715073) internal successors, (203094), 52259 states have internal predecessors, (203094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52260 states to 52260 states and 203094 transitions. [2021-07-09 18:38:09,460 INFO L78 Accepts]: Start accepts. Automaton has 52260 states and 203094 transitions. Word has length 28 [2021-07-09 18:38:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:09,460 INFO L482 AbstractCegarLoop]: Abstraction has 52260 states and 203094 transitions. [2021-07-09 18:38:09,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 52260 states and 203094 transitions. [2021-07-09 18:38:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:09,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:09,563 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:09,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:09,779 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 81 times [2021-07-09 18:38:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:09,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761297969] [2021-07-09 18:38:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:09,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:09,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761297969] [2021-07-09 18:38:09,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761297969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:09,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139243916] [2021-07-09 18:38:09,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:09,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:38:09,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:38:09,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:38:09,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139243916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:09,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:09,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:38:09,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854788334] [2021-07-09 18:38:09,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:38:09,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:09,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:38:09,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:38:09,884 INFO L87 Difference]: Start difference. First operand 52260 states and 203094 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:10,666 INFO L93 Difference]: Finished difference Result 56568 states and 217524 transitions. [2021-07-09 18:38:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:38:10,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:10,868 INFO L225 Difference]: With dead ends: 56568 [2021-07-09 18:38:10,868 INFO L226 Difference]: Without dead ends: 56556 [2021-07-09 18:38:10,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:38:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56556 states. [2021-07-09 18:38:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56556 to 52394. [2021-07-09 18:38:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8846601645257954) internal successors, (203529), 52393 states have internal predecessors, (203529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203529 transitions. [2021-07-09 18:38:12,900 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203529 transitions. Word has length 28 [2021-07-09 18:38:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:12,900 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203529 transitions. [2021-07-09 18:38:12,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203529 transitions. [2021-07-09 18:38:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:12,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:12,996 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:13,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-07-09 18:38:13,209 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 82 times [2021-07-09 18:38:13,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:13,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867408080] [2021-07-09 18:38:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:13,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:13,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867408080] [2021-07-09 18:38:13,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867408080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:13,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112814359] [2021-07-09 18:38:13,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:13,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:13,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:38:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:13,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112814359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:13,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:13,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 18:38:13,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440023429] [2021-07-09 18:38:13,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:38:13,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:38:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:38:13,317 INFO L87 Difference]: Start difference. First operand 52394 states and 203529 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:14,256 INFO L93 Difference]: Finished difference Result 56532 states and 217440 transitions. [2021-07-09 18:38:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:38:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:14,441 INFO L225 Difference]: With dead ends: 56532 [2021-07-09 18:38:14,441 INFO L226 Difference]: Without dead ends: 56512 [2021-07-09 18:38:14,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:38:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56512 states. [2021-07-09 18:38:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56512 to 52394. [2021-07-09 18:38:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8845838184490296) internal successors, (203525), 52393 states have internal predecessors, (203525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203525 transitions. [2021-07-09 18:38:16,382 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203525 transitions. Word has length 28 [2021-07-09 18:38:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:16,382 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203525 transitions. [2021-07-09 18:38:16,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203525 transitions. [2021-07-09 18:38:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:16,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:16,480 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:16,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-07-09 18:38:16,696 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-07-09 18:38:16,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:16,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797383555] [2021-07-09 18:38:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:16,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797383555] [2021-07-09 18:38:16,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797383555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563392843] [2021-07-09 18:38:16,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:16,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:16,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:16,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:16,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:16,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563392843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:16,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:16,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:38:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403865121] [2021-07-09 18:38:16,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:16,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:16,810 INFO L87 Difference]: Start difference. First operand 52394 states and 203525 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:17,554 INFO L93 Difference]: Finished difference Result 57355 states and 221090 transitions. [2021-07-09 18:38:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:17,759 INFO L225 Difference]: With dead ends: 57355 [2021-07-09 18:38:17,759 INFO L226 Difference]: Without dead ends: 57342 [2021-07-09 18:38:17,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:38:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57342 states. [2021-07-09 18:38:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57342 to 55127. [2021-07-09 18:38:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55127 states, 55126 states have (on average 3.891321699379603) internal successors, (214513), 55126 states have internal predecessors, (214513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55127 states to 55127 states and 214513 transitions. [2021-07-09 18:38:19,519 INFO L78 Accepts]: Start accepts. Automaton has 55127 states and 214513 transitions. Word has length 28 [2021-07-09 18:38:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:19,519 INFO L482 AbstractCegarLoop]: Abstraction has 55127 states and 214513 transitions. [2021-07-09 18:38:19,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 55127 states and 214513 transitions. [2021-07-09 18:38:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:19,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:19,628 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:19,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-07-09 18:38:19,843 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-07-09 18:38:19,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:19,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113133884] [2021-07-09 18:38:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:19,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:19,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113133884] [2021-07-09 18:38:19,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113133884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:19,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525010866] [2021-07-09 18:38:19,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:19,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:19,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525010866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:19,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:19,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:38:19,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087995084] [2021-07-09 18:38:19,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:19,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:19,966 INFO L87 Difference]: Start difference. First operand 55127 states and 214513 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:20,830 INFO L93 Difference]: Finished difference Result 61086 states and 233937 transitions. [2021-07-09 18:38:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:38:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:21,036 INFO L225 Difference]: With dead ends: 61086 [2021-07-09 18:38:21,036 INFO L226 Difference]: Without dead ends: 61086 [2021-07-09 18:38:21,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:38:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-07-09 18:38:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 48711. [2021-07-09 18:38:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48711 states, 48710 states have (on average 3.8803736399096693) internal successors, (189013), 48710 states have internal predecessors, (189013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48711 states to 48711 states and 189013 transitions. [2021-07-09 18:38:22,759 INFO L78 Accepts]: Start accepts. Automaton has 48711 states and 189013 transitions. Word has length 28 [2021-07-09 18:38:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:22,759 INFO L482 AbstractCegarLoop]: Abstraction has 48711 states and 189013 transitions. [2021-07-09 18:38:22,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 48711 states and 189013 transitions. [2021-07-09 18:38:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:22,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:22,884 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:23,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-07-09 18:38:23,100 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:23,100 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-07-09 18:38:23,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:23,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274033022] [2021-07-09 18:38:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:23,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:23,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274033022] [2021-07-09 18:38:23,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274033022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:23,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543016543] [2021-07-09 18:38:23,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:23,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:23,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:23,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:23,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543016543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:23,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:23,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:38:23,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602749453] [2021-07-09 18:38:23,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:38:23,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:23,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:38:23,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:38:23,225 INFO L87 Difference]: Start difference. First operand 48711 states and 189013 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:24,134 INFO L93 Difference]: Finished difference Result 53676 states and 205772 transitions. [2021-07-09 18:38:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:24,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:24,313 INFO L225 Difference]: With dead ends: 53676 [2021-07-09 18:38:24,313 INFO L226 Difference]: Without dead ends: 53676 [2021-07-09 18:38:24,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:38:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53676 states. [2021-07-09 18:38:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53676 to 49544. [2021-07-09 18:38:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49544 states, 49543 states have (on average 3.878872898290374) internal successors, (192171), 49543 states have internal predecessors, (192171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49544 states to 49544 states and 192171 transitions. [2021-07-09 18:38:25,860 INFO L78 Accepts]: Start accepts. Automaton has 49544 states and 192171 transitions. Word has length 28 [2021-07-09 18:38:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:25,860 INFO L482 AbstractCegarLoop]: Abstraction has 49544 states and 192171 transitions. [2021-07-09 18:38:25,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 49544 states and 192171 transitions. [2021-07-09 18:38:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:25,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:25,954 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:26,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:26,169 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:26,169 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-07-09 18:38:26,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:26,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117601466] [2021-07-09 18:38:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:26,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:26,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117601466] [2021-07-09 18:38:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117601466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:26,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669821673] [2021-07-09 18:38:26,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:26,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:38:26,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:26,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:38:26,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669821673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:26,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:26,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 18:38:26,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455898141] [2021-07-09 18:38:26,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:26,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:26,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:26,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:26,333 INFO L87 Difference]: Start difference. First operand 49544 states and 192171 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:27,219 INFO L93 Difference]: Finished difference Result 52408 states and 201958 transitions. [2021-07-09 18:38:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:38:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:27,409 INFO L225 Difference]: With dead ends: 52408 [2021-07-09 18:38:27,409 INFO L226 Difference]: Without dead ends: 52408 [2021-07-09 18:38:27,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:38:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52408 states. [2021-07-09 18:38:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52408 to 49552. [2021-07-09 18:38:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49552 states, 49551 states have (on average 3.8787310044196888) internal successors, (192195), 49551 states have internal predecessors, (192195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49552 states to 49552 states and 192195 transitions. [2021-07-09 18:38:29,082 INFO L78 Accepts]: Start accepts. Automaton has 49552 states and 192195 transitions. Word has length 28 [2021-07-09 18:38:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:29,082 INFO L482 AbstractCegarLoop]: Abstraction has 49552 states and 192195 transitions. [2021-07-09 18:38:29,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 49552 states and 192195 transitions. [2021-07-09 18:38:29,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:38:29,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:29,254 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:29,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:29,470 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:29,471 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-07-09 18:38:29,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:29,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33429456] [2021-07-09 18:38:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:29,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:29,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33429456] [2021-07-09 18:38:29,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33429456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:29,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865727755] [2021-07-09 18:38:29,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:29,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:29,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:29,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:38:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:29,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865727755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:29,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:29,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:38:29,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238539899] [2021-07-09 18:38:29,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:38:29,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:29,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:38:29,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:38:29,604 INFO L87 Difference]: Start difference. First operand 49552 states and 192195 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:30,594 INFO L93 Difference]: Finished difference Result 51100 states and 197405 transitions. [2021-07-09 18:38:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:30,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:38:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:30,853 INFO L225 Difference]: With dead ends: 51100 [2021-07-09 18:38:30,853 INFO L226 Difference]: Without dead ends: 51100 [2021-07-09 18:38:30,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:38:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51100 states. [2021-07-09 18:38:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51100 to 49446. [2021-07-09 18:38:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49446 states, 49445 states have (on average 3.878471028415411) internal successors, (191771), 49445 states have internal predecessors, (191771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49446 states to 49446 states and 191771 transitions. [2021-07-09 18:38:32,551 INFO L78 Accepts]: Start accepts. Automaton has 49446 states and 191771 transitions. Word has length 28 [2021-07-09 18:38:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:32,551 INFO L482 AbstractCegarLoop]: Abstraction has 49446 states and 191771 transitions. [2021-07-09 18:38:32,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 49446 states and 191771 transitions. [2021-07-09 18:38:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:38:32,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:32,648 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:32,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:32,864 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-07-09 18:38:32,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:32,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498502372] [2021-07-09 18:38:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:33,105 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-09 18:38:33,260 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-09 18:38:33,648 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-09 18:38:33,769 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 18:38:33,890 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-07-09 18:38:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:34,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:34,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498502372] [2021-07-09 18:38:34,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498502372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:34,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675129950] [2021-07-09 18:38:34,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:38:34,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:38:34,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:38:34,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:34,446 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 18:38:34,659 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-09 18:38:35,241 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2021-07-09 18:38:35,475 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 18:38:35,677 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-09 18:38:35,908 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_558, A, v_prenex_560, v_prenex_562, v_prenex_564, v_prenex_566], 6=[v_prenex_554, v_prenex_556]} [2021-07-09 18:38:35,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:35,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:35,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-07-09 18:38:35,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:35,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,471 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 143 [2021-07-09 18:38:36,471 INFO L628 ElimStorePlain]: treesize reduction 280, result has 60.3 percent of original size [2021-07-09 18:38:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:36,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:36,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,679 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-09 18:38:36,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:36,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:36,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:36,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:36,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,873 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:38:36,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:36,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:36,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:38:36,895 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,040 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 18:38:37,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:37,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:37,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,187 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:38:37,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:37,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:37,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,326 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-09 18:38:37,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:37,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:37,336 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,463 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-09 18:38:37,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-07-09 18:38:37,472 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,589 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:38:37,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:37,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-09 18:38:37,595 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:757, output treesize:114 [2021-07-09 18:38:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:37,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675129950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:37,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:37,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:38:37,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069508804] [2021-07-09 18:38:37,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:38:37,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:37,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:38:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:38:37,694 INFO L87 Difference]: Start difference. First operand 49446 states and 191771 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:38,108 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2021-07-09 18:38:38,482 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2021-07-09 18:38:38,630 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-07-09 18:38:39,119 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 79 [2021-07-09 18:38:39,459 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2021-07-09 18:38:39,835 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-07-09 18:38:40,383 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2021-07-09 18:38:41,006 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 84 [2021-07-09 18:38:41,269 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-07-09 18:38:41,461 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-07-09 18:38:42,004 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 96 [2021-07-09 18:38:42,484 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2021-07-09 18:38:42,983 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 112 [2021-07-09 18:38:44,033 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 153 [2021-07-09 18:38:44,483 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-07-09 18:38:44,899 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2021-07-09 18:38:45,296 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-09 18:38:45,798 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-07-09 18:38:46,159 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-07-09 18:38:46,484 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2021-07-09 18:38:46,888 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2021-07-09 18:38:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:47,284 INFO L93 Difference]: Finished difference Result 57718 states and 215952 transitions. [2021-07-09 18:38:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:38:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:38:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:47,662 INFO L225 Difference]: With dead ends: 57718 [2021-07-09 18:38:47,662 INFO L226 Difference]: Without dead ends: 57628 [2021-07-09 18:38:47,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 10796.4ms TimeCoverageRelationStatistics Valid=458, Invalid=1992, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:38:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57628 states. [2021-07-09 18:38:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57628 to 49581. [2021-07-09 18:38:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49581 states, 49580 states have (on average 3.8776926179911255) internal successors, (192256), 49580 states have internal predecessors, (192256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49581 states to 49581 states and 192256 transitions. [2021-07-09 18:38:49,353 INFO L78 Accepts]: Start accepts. Automaton has 49581 states and 192256 transitions. Word has length 30 [2021-07-09 18:38:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:49,353 INFO L482 AbstractCegarLoop]: Abstraction has 49581 states and 192256 transitions. [2021-07-09 18:38:49,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 49581 states and 192256 transitions. [2021-07-09 18:38:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:38:49,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:49,455 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:49,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:49,670 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-07-09 18:38:49,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:49,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667538314] [2021-07-09 18:38:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:50,022 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-07-09 18:38:50,205 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 18:38:50,386 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-09 18:38:50,624 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-07-09 18:38:50,752 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:38:50,874 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 18:38:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:50,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:50,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667538314] [2021-07-09 18:38:50,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667538314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:50,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646352002] [2021-07-09 18:38:50,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:51,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:38:51,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:51,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:38:51,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:51,358 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 18:38:51,608 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-09 18:38:52,198 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-07-09 18:38:52,426 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-09 18:38:53,136 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 131 [2021-07-09 18:38:53,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:53,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:53,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,635 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-07-09 18:38:53,635 INFO L628 ElimStorePlain]: treesize reduction 86, result has 82.7 percent of original size [2021-07-09 18:38:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:53,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:38:53,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,808 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-07-09 18:38:53,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:53,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:53,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,973 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-09 18:38:53,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:53,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:53,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,131 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-09 18:38:54,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:54,140 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,277 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:38:54,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:54,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,412 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-09 18:38:54,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:54,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,540 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 18:38:54,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:54,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,658 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 18:38:54,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:54,669 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:54,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,792 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-09 18:38:54,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 9 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-09 18:38:54,797 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 27 variables, input treesize:525, output treesize:114 [2021-07-09 18:38:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:54,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646352002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:54,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:54,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:38:54,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132210715] [2021-07-09 18:38:54,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:38:54,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:54,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:38:54,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:38:54,908 INFO L87 Difference]: Start difference. First operand 49581 states and 192256 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:55,132 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-07-09 18:38:55,369 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 44 [2021-07-09 18:38:55,892 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 18:38:56,198 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 70 [2021-07-09 18:38:56,468 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2021-07-09 18:38:57,320 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 89 [2021-07-09 18:38:58,048 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2021-07-09 18:38:58,204 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-09 18:38:59,024 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-07-09 18:38:59,392 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:38:59,903 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 102 [2021-07-09 18:39:00,136 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-07-09 18:39:00,474 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-09 18:39:00,825 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-09 18:39:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:01,194 INFO L93 Difference]: Finished difference Result 52816 states and 201749 transitions. [2021-07-09 18:39:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:39:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:39:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:01,389 INFO L225 Difference]: With dead ends: 52816 [2021-07-09 18:39:01,389 INFO L226 Difference]: Without dead ends: 52771 [2021-07-09 18:39:01,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 7693.8ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:39:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52771 states. [2021-07-09 18:39:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52771 to 49618. [2021-07-09 18:39:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49618 states, 49617 states have (on average 3.877360582058569) internal successors, (192383), 49617 states have internal predecessors, (192383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49618 states to 49618 states and 192383 transitions. [2021-07-09 18:39:03,049 INFO L78 Accepts]: Start accepts. Automaton has 49618 states and 192383 transitions. Word has length 30 [2021-07-09 18:39:03,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:03,050 INFO L482 AbstractCegarLoop]: Abstraction has 49618 states and 192383 transitions. [2021-07-09 18:39:03,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 49618 states and 192383 transitions. [2021-07-09 18:39:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:39:03,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:03,146 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:03,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-07-09 18:39:03,361 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-07-09 18:39:03,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:03,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951054018] [2021-07-09 18:39:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:03,795 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-07-09 18:39:04,250 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-07-09 18:39:04,673 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2021-07-09 18:39:04,943 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-07-09 18:39:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:05,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:05,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951054018] [2021-07-09 18:39:05,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951054018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:05,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740188890] [2021-07-09 18:39:05,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:39:05,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:05,524 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 18:39:06,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:06,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-07-09 18:39:06,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:39:06,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-07-09 18:39:06,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2021-07-09 18:39:06,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:39:06,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:06,489 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-07-09 18:39:06,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 18:39:06,522 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:06,538 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:06,555 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-07-09 18:39:06,573 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:39:06,589 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:06,605 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-07-09 18:39:06,622 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:06,638 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-07-09 18:39:06,653 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:39:06,670 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:39:06,685 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-09 18:39:06,702 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:39:06,717 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:06,735 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-09 18:39:06,751 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-07-09 18:39:06,767 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-07-09 18:39:06,783 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-07-09 18:39:06,800 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-07-09 18:39:06,817 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-07-09 18:39:06,833 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-07-09 18:39:06,850 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:06,867 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-09 18:39:06,883 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:39:06,899 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 25 [2021-07-09 18:39:06,916 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:06,933 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:06,950 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-07-09 18:39:06,966 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:06,983 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:06,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:39:06,999 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-07-09 18:39:07,016 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:39:07,032 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:07,048 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:07,065 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:07,082 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:39:07,099 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:39:07,115 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:39:07,131 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:39:07,148 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-07-09 18:39:07,164 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-07-09 18:39:07,181 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:39:07,211 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:07,225 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:07,239 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-07-09 18:39:07,255 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 25 [2021-07-09 18:39:07,270 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:39:07,285 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:07,299 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:07,314 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:39:07,328 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:39:07,342 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:39:07,356 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:39:07,370 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:39:07,382 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:07,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:07,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-07-09 18:39:07,389 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:07,495 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-07-09 18:39:07,495 INFO L628 ElimStorePlain]: treesize reduction 179, result has 29.5 percent of original size [2021-07-09 18:39:07,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:39:07,497 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-07-09 18:39:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:07,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740188890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:07,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:07,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:39:07,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001886509] [2021-07-09 18:39:07,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:39:07,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:07,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:39:07,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:39:07,560 INFO L87 Difference]: Start difference. First operand 49618 states and 192383 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:08,797 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 81 [2021-07-09 18:39:09,228 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 73 [2021-07-09 18:39:09,378 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-07-09 18:39:09,734 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 80 [2021-07-09 18:39:10,397 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 81 [2021-07-09 18:39:10,918 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 106 [2021-07-09 18:39:11,249 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 89 [2021-07-09 18:39:11,456 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:39:11,735 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 85 [2021-07-09 18:39:11,929 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-07-09 18:39:12,307 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 81 [2021-07-09 18:39:12,448 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-07-09 18:39:12,838 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 88 [2021-07-09 18:39:13,061 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 70 [2021-07-09 18:39:13,406 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 84 [2021-07-09 18:39:13,653 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 84 [2021-07-09 18:39:14,110 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 99 [2021-07-09 18:39:14,384 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 18:39:14,587 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 66 [2021-07-09 18:39:14,932 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-09 18:39:15,313 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 85 [2021-07-09 18:39:15,508 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2021-07-09 18:39:15,903 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 86 [2021-07-09 18:39:16,151 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 70 [2021-07-09 18:39:16,484 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-07-09 18:39:16,768 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2021-07-09 18:39:17,063 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-07-09 18:39:17,383 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-07-09 18:39:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:17,797 INFO L93 Difference]: Finished difference Result 70379 states and 263440 transitions. [2021-07-09 18:39:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:39:17,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:39:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:18,044 INFO L225 Difference]: With dead ends: 70379 [2021-07-09 18:39:18,044 INFO L226 Difference]: Without dead ends: 70349 [2021-07-09 18:39:18,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 10946.7ms TimeCoverageRelationStatistics Valid=537, Invalid=3623, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:39:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70349 states. [2021-07-09 18:39:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70349 to 49657. [2021-07-09 18:39:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49657 states, 49656 states have (on average 3.877094409537619) internal successors, (192521), 49656 states have internal predecessors, (192521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49657 states to 49657 states and 192521 transitions. [2021-07-09 18:39:19,632 INFO L78 Accepts]: Start accepts. Automaton has 49657 states and 192521 transitions. Word has length 30 [2021-07-09 18:39:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:19,632 INFO L482 AbstractCegarLoop]: Abstraction has 49657 states and 192521 transitions. [2021-07-09 18:39:19,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 49657 states and 192521 transitions. [2021-07-09 18:39:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:39:20,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:20,110 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:20,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:20,326 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-07-09 18:39:20,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:20,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734463557] [2021-07-09 18:39:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:20,563 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-07-09 18:39:20,759 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-09 18:39:20,945 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-09 18:39:21,072 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-09 18:39:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:21,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:21,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734463557] [2021-07-09 18:39:21,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734463557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:21,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934102894] [2021-07-09 18:39:21,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:21,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:21,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:39:21,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:21,431 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:39:21,782 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-07-09 18:39:21,994 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-09 18:39:22,493 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2021-07-09 18:39:23,030 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-09 18:39:23,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:23,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 62 [2021-07-09 18:39:23,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:24,399 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 347 DAG size of output: 338 [2021-07-09 18:39:24,400 INFO L628 ElimStorePlain]: treesize reduction 28, result has 96.9 percent of original size [2021-07-09 18:39:24,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:24,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-07-09 18:39:24,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:24,900 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2021-07-09 18:39:24,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:24,960 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:39:24,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 43 [2021-07-09 18:39:24,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:25,390 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2021-07-09 18:39:25,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:25,451 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:39:25,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:39:25,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:25,887 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2021-07-09 18:39:25,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:25,951 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:39:25,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 50 [2021-07-09 18:39:25,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,423 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2021-07-09 18:39:26,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:26,482 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:39:26,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 43 [2021-07-09 18:39:26,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,903 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2021-07-09 18:39:26,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:26,969 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:39:26,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 54 [2021-07-09 18:39:26,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:27,397 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2021-07-09 18:39:27,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:27,463 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:39:27,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-07-09 18:39:27,484 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:28,327 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 318 [2021-07-09 18:39:28,327 INFO L628 ElimStorePlain]: treesize reduction 9, result has 98.9 percent of original size [2021-07-09 18:39:28,396 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:39:28,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 58 [2021-07-09 18:39:28,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:29,308 WARN L205 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 315 [2021-07-09 18:39:29,308 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.1 percent of original size [2021-07-09 18:39:29,374 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:39:29,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-09 18:39:29,384 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:30,215 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 309 [2021-07-09 18:39:30,216 INFO L628 ElimStorePlain]: treesize reduction 32, result has 96.1 percent of original size [2021-07-09 18:39:30,278 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:39:30,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 54 [2021-07-09 18:39:30,281 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:30,701 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2021-07-09 18:39:30,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:30,769 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:39:30,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-09 18:39:30,789 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,597 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 301 [2021-07-09 18:39:31,598 INFO L628 ElimStorePlain]: treesize reduction 9, result has 98.8 percent of original size [2021-07-09 18:39:31,651 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-07-09 18:39:31,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 39 [2021-07-09 18:39:31,652 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:32,113 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2021-07-09 18:39:32,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:32,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:32,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 62 [2021-07-09 18:39:32,169 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:32,983 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 297 [2021-07-09 18:39:32,983 INFO L628 ElimStorePlain]: treesize reduction 25, result has 96.8 percent of original size [2021-07-09 18:39:33,040 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:39:33,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:39:33,046 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,441 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2021-07-09 18:39:33,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,496 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:39:33,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:39:33,501 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,893 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-07-09 18:39:33,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 16 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-07-09 18:39:34,000 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 48 variables, input treesize:877, output treesize:1238 [2021-07-09 18:39:34,647 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 48 [2021-07-09 18:39:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:34,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934102894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:34,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:34,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 18:39:34,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341150014] [2021-07-09 18:39:34,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:39:34,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:34,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:39:34,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:39:34,772 INFO L87 Difference]: Start difference. First operand 49657 states and 192521 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:34,982 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 36 [2021-07-09 18:39:35,357 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 47 [2021-07-09 18:39:35,990 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 86 [2021-07-09 18:39:36,430 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2021-07-09 18:39:36,626 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-07-09 18:39:36,982 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-07-09 18:39:37,361 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2021-07-09 18:39:37,654 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 55 [2021-07-09 18:39:38,099 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 71 [2021-07-09 18:39:38,596 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2021-07-09 18:39:38,922 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 56 [2021-07-09 18:39:39,098 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-09 18:39:39,309 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 58 [2021-07-09 18:39:40,191 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 113 [2021-07-09 18:39:40,971 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 76 [2021-07-09 18:39:41,407 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 89 [2021-07-09 18:39:42,447 WARN L205 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 103 [2021-07-09 18:39:42,882 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-07-09 18:39:43,745 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 153 [2021-07-09 18:39:44,009 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 74 [2021-07-09 18:39:44,402 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-07-09 18:39:45,388 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 157 [2021-07-09 18:39:46,280 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 141 [2021-07-09 18:39:46,962 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 97 [2021-07-09 18:39:47,350 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-07-09 18:39:48,273 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 138 [2021-07-09 18:39:48,899 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 83 [2021-07-09 18:39:49,808 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 120 [2021-07-09 18:39:51,505 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 215 DAG size of output: 160 [2021-07-09 18:39:51,933 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-07-09 18:39:52,485 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 59 [2021-07-09 18:39:52,960 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 58 [2021-07-09 18:39:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:53,241 INFO L93 Difference]: Finished difference Result 63922 states and 240994 transitions. [2021-07-09 18:39:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:39:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:39:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:53,472 INFO L225 Difference]: With dead ends: 63922 [2021-07-09 18:39:53,472 INFO L226 Difference]: Without dead ends: 63892 [2021-07-09 18:39:53,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 19326.4ms TimeCoverageRelationStatistics Valid=636, Invalid=3524, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:39:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63892 states. [2021-07-09 18:39:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63892 to 49681. [2021-07-09 18:39:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49681 states, 49680 states have (on average 3.8768719806763285) internal successors, (192603), 49680 states have internal predecessors, (192603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49681 states to 49681 states and 192603 transitions. [2021-07-09 18:39:55,088 INFO L78 Accepts]: Start accepts. Automaton has 49681 states and 192603 transitions. Word has length 30 [2021-07-09 18:39:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:55,088 INFO L482 AbstractCegarLoop]: Abstraction has 49681 states and 192603 transitions. [2021-07-09 18:39:55,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 49681 states and 192603 transitions. [2021-07-09 18:39:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:39:55,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:55,189 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:55,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4432,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:55,405 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-07-09 18:39:55,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:55,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476135809] [2021-07-09 18:39:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:56,229 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-07-09 18:39:56,501 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2021-07-09 18:39:56,661 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 94 [2021-07-09 18:39:56,904 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-07-09 18:39:57,084 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:39:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:57,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:57,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476135809] [2021-07-09 18:39:57,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476135809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:57,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500493016] [2021-07-09 18:39:57,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:57,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:39:57,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:57,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:39:57,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:57,683 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-09 18:39:57,914 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 18:39:58,223 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:39:58,704 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2021-07-09 18:39:59,175 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:39:59,703 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 185 [2021-07-09 18:40:00,127 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-07-09 18:40:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:00,473 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-09 18:40:00,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2021-07-09 18:40:00,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:00,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:00,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:00,570 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:40:00,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 56 [2021-07-09 18:40:00,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:00,645 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-09 18:40:00,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 49 [2021-07-09 18:40:00,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:00,716 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-07-09 18:40:00,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 54 [2021-07-09 18:40:00,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:00,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:00,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:00,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:00,810 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-09 18:40:00,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 64 [2021-07-09 18:40:00,818 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:00,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:00,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:00,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:00,899 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:40:00,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 51 treesize of output 59 [2021-07-09 18:40:00,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:00,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:00,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:00,989 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-09 18:40:00,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 51 treesize of output 55 [2021-07-09 18:40:00,991 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:01,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:01,064 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-09 18:40:01,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 49 [2021-07-09 18:40:01,066 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:01,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:01,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:01,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:01,143 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:40:01,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 53 [2021-07-09 18:40:01,148 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:01,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:01,212 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:40:01,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 56 [2021-07-09 18:40:01,214 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:02,913 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 354 DAG size of output: 326 [2021-07-09 18:40:02,914 INFO L628 ElimStorePlain]: treesize reduction 97, result has 91.9 percent of original size [2021-07-09 18:40:02,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:02,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:02,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:02,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:02,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 68 [2021-07-09 18:40:02,996 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:03,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:03,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 68 [2021-07-09 18:40:03,080 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:03,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,158 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:40:03,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 53 [2021-07-09 18:40:03,165 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,255 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:40:03,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 56 [2021-07-09 18:40:03,259 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:03,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,338 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:40:03,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 56 [2021-07-09 18:40:03,343 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,413 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:40:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 50 [2021-07-09 18:40:03,422 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:03,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:03,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:03,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 65 [2021-07-09 18:40:03,502 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:03,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:03,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 63 [2021-07-09 18:40:03,590 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:03,666 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-07-09 18:40:03,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 49 [2021-07-09 18:40:03,670 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:03,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:03,739 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-07-09 18:40:03,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 61 [2021-07-09 18:40:03,759 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:04,739 WARN L205 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 294 [2021-07-09 18:40:04,739 INFO L628 ElimStorePlain]: treesize reduction 250, result has 78.3 percent of original size [2021-07-09 18:40:04,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 36 dim-0 vars, 2 dim-1 vars, End of recursive call: and 20 xjuncts. [2021-07-09 18:40:04,795 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 38 variables, input treesize:1193, output treesize:1265 [2021-07-09 18:40:05,406 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2021-07-09 18:40:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:05,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500493016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:05,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:05,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-07-09 18:40:05,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003168727] [2021-07-09 18:40:05,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:40:05,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:40:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:40:05,496 INFO L87 Difference]: Start difference. First operand 49681 states and 192603 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:06,714 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-09 18:40:07,063 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2021-07-09 18:40:07,220 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-07-09 18:40:08,007 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 94 [2021-07-09 18:40:08,745 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 73 [2021-07-09 18:40:09,051 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2021-07-09 18:40:09,918 WARN L205 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 91 [2021-07-09 18:40:10,607 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 141 [2021-07-09 18:40:10,874 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2021-07-09 18:40:11,037 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2021-07-09 18:40:11,217 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-07-09 18:40:12,151 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 105 [2021-07-09 18:40:12,447 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:40:13,141 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 97 [2021-07-09 18:40:13,542 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-07-09 18:40:14,688 WARN L205 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 102 [2021-07-09 18:40:15,420 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 140 [2021-07-09 18:40:16,270 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 152 [2021-07-09 18:40:16,584 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-07-09 18:40:17,542 WARN L205 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 94 [2021-07-09 18:40:18,274 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 144 [2021-07-09 18:40:19,075 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 148 [2021-07-09 18:40:19,826 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2021-07-09 18:40:20,324 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 111 [2021-07-09 18:40:20,553 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-09 18:40:20,798 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 18:40:21,820 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 116 [2021-07-09 18:40:22,652 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 143 [2021-07-09 18:40:23,732 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 147 [2021-07-09 18:40:24,179 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 96 [2021-07-09 18:40:24,745 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 122 [2021-07-09 18:40:25,034 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 81 [2021-07-09 18:40:25,596 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 115 [2021-07-09 18:40:26,810 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 137 [2021-07-09 18:40:27,819 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 140 [2021-07-09 18:40:28,553 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 140 [2021-07-09 18:40:29,331 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 132 [2021-07-09 18:40:30,146 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 141 [2021-07-09 18:40:30,505 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2021-07-09 18:40:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:30,821 INFO L93 Difference]: Finished difference Result 70546 states and 263970 transitions. [2021-07-09 18:40:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:40:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:40:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:31,085 INFO L225 Difference]: With dead ends: 70546 [2021-07-09 18:40:31,085 INFO L226 Difference]: Without dead ends: 70516 [2021-07-09 18:40:31,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 25913.2ms TimeCoverageRelationStatistics Valid=706, Invalid=5456, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:40:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70516 states. [2021-07-09 18:40:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70516 to 49693. [2021-07-09 18:40:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49693 states, 49692 states have (on average 3.8769419624889316) internal successors, (192653), 49692 states have internal predecessors, (192653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49693 states to 49693 states and 192653 transitions. [2021-07-09 18:40:32,919 INFO L78 Accepts]: Start accepts. Automaton has 49693 states and 192653 transitions. Word has length 30 [2021-07-09 18:40:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:32,919 INFO L482 AbstractCegarLoop]: Abstraction has 49693 states and 192653 transitions. [2021-07-09 18:40:32,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 49693 states and 192653 transitions. [2021-07-09 18:40:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:40:33,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:33,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:33,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-07-09 18:40:33,239 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:33,240 INFO L82 PathProgramCache]: Analyzing trace with hash 26395198, now seen corresponding path program 178 times [2021-07-09 18:40:33,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:33,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972982767] [2021-07-09 18:40:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:33,729 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-07-09 18:40:33,910 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-09 18:40:34,030 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 18:40:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:34,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:34,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972982767] [2021-07-09 18:40:34,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972982767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:34,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17189336] [2021-07-09 18:40:34,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:34,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:40:34,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:35,555 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-09 18:40:36,039 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-09 18:40:36,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:36,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-07-09 18:40:36,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:40:36,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:36,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:40:36,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:40:36,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:36,337 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:40:36,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:40:36,372 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-07-09 18:40:36,386 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-07-09 18:40:36,400 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-07-09 18:40:36,415 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:36,429 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-07-09 18:40:36,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-07-09 18:40:36,457 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:36,470 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2021-07-09 18:40:36,485 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 25 [2021-07-09 18:40:36,499 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-07-09 18:40:36,512 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:36,545 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:36,560 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:40:36,574 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:36,588 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:36,601 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:40:36,615 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-07-09 18:40:36,628 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:36,642 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-09 18:40:36,658 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:40:36,672 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 25 [2021-07-09 18:40:36,692 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-07-09 18:40:36,706 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-07-09 18:40:36,720 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:36,733 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:40:36,747 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-09 18:40:36,760 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:40:36,774 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:40:36,788 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:40:36,802 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:40:36,816 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-07-09 18:40:36,829 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-07-09 18:40:36,844 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-07-09 18:40:36,858 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:36,872 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-07-09 18:40:36,911 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:40:36,925 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:40:36,938 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-07-09 18:40:36,952 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-07-09 18:40:36,965 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:40:36,978 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:36,991 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:36,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:36,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:36,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:37,004 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:37,017 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 18:40:37,029 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:37,043 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-07-09 18:40:37,055 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:40:37,068 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-09 18:40:37,082 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:40:37,095 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:40:37,107 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-07-09 18:40:37,119 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-09 18:40:37,131 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:40:37,156 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:37,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:40:37,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-07-09 18:40:37,162 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:37,247 INFO L628 ElimStorePlain]: treesize reduction 163, result has 31.5 percent of original size [2021-07-09 18:40:37,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:40:37,248 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-07-09 18:40:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:37,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17189336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:37,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:37,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:40:37,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140191172] [2021-07-09 18:40:37,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:40:37,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:37,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:40:37,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:40:37,312 INFO L87 Difference]: Start difference. First operand 49693 states and 192653 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:37,540 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-07-09 18:40:38,177 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 46 [2021-07-09 18:40:38,693 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2021-07-09 18:40:38,997 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 72 [2021-07-09 18:40:39,621 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 85 [2021-07-09 18:40:39,779 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:40:40,311 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2021-07-09 18:40:40,949 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 99 [2021-07-09 18:40:41,433 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2021-07-09 18:40:42,007 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 86 [2021-07-09 18:40:42,204 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-09 18:40:42,946 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-07-09 18:40:43,599 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 98 [2021-07-09 18:40:43,977 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 74 [2021-07-09 18:40:44,357 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 78 [2021-07-09 18:40:45,159 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 113 [2021-07-09 18:40:45,785 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 105 [2021-07-09 18:40:46,163 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2021-07-09 18:40:46,639 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 97 [2021-07-09 18:40:46,888 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-07-09 18:40:47,448 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2021-07-09 18:40:47,621 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 65 [2021-07-09 18:40:48,055 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-07-09 18:40:48,754 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 108 [2021-07-09 18:40:49,348 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 100 [2021-07-09 18:40:50,078 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 104 [2021-07-09 18:40:50,741 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 107 [2021-07-09 18:40:50,955 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 95 Received shutdown request... [2021-07-09 18:40:51,093 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-07-09 18:40:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:40:51,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4715 [2021-07-09 18:40:51,293 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:40:51,295 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:40:51,296 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:40:51,297 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:40:51 BasicIcfg [2021-07-09 18:40:51,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:40:51,297 INFO L168 Benchmark]: Toolchain (without parser) took 876438.36 ms. Allocated memory was 231.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 212.7 MB in the beginning and 5.7 GB in the end (delta: -5.4 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-07-09 18:40:51,297 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 231.7 MB. Free memory is still 213.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:40:51,297 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.55 ms. Allocated memory is still 231.7 MB. Free memory was 212.5 MB in the beginning and 211.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:40:51,297 INFO L168 Benchmark]: Boogie Preprocessor took 18.62 ms. Allocated memory is still 231.7 MB. Free memory was 211.1 MB in the beginning and 210.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:40:51,297 INFO L168 Benchmark]: RCFGBuilder took 213.17 ms. Allocated memory is still 231.7 MB. Free memory was 210.1 MB in the beginning and 196.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:40:51,297 INFO L168 Benchmark]: TraceAbstraction took 876180.93 ms. Allocated memory was 231.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 196.2 MB in the beginning and 5.7 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-07-09 18:40:51,297 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 231.7 MB. Free memory is still 213.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.55 ms. Allocated memory is still 231.7 MB. Free memory was 212.5 MB in the beginning and 211.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.62 ms. Allocated memory is still 231.7 MB. Free memory was 211.1 MB in the beginning and 210.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 213.17 ms. Allocated memory is still 231.7 MB. Free memory was 210.1 MB in the beginning and 196.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 876180.93 ms. Allocated memory was 231.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 196.2 MB in the beginning and 5.7 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (49693states) and FLOYD_HOARE automaton (currently 58 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 127 for 26ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 876107.5ms, OverallIterations: 263, TraceHistogramMax: 3, EmptinessCheckTime: 9200.2ms, AutomataDifference: 460234.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11748 SDtfs, 75056 SDslu, 90674 SDs, 0 SdLazy, 145923 SolverSat, 13595 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84026.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16965 GetRequests, 5536 SyntacticMatches, 248 SemanticMatches, 11180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189437 ImplicationChecksByTransitivity, 403828.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55127occurred in iteration=253, InterpolantAutomatonStates: 9852, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 117916.3ms AutomataMinimizationTime, 262 MinimizatonAttempts, 1373263 StatesRemovedByMinimization, 262 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 906.4ms SsaConstructionTime, 2798.0ms SatisfiabilityAnalysisTime, 223390.0ms InterpolantComputationTime, 13986 NumberOfCodeBlocks, 13986 NumberOfCodeBlocksAsserted, 908 NumberOfCheckSat, 13463 ConstructedInterpolants, 189 QuantifiedInterpolants, 286880 SizeOfPredicates, 1167 NumberOfNonLiveVariables, 18190 ConjunctsInSsa, 3961 ConjunctsInUnsatCore, 523 InterpolantComputations, 3 PerfectInterpolantSequences, 1026/4462 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown