/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/min-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:35:03,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:35:03,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:35:03,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:35:03,478 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 [2021-07-13 20:35:03,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:35:03,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:35:03,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:35:03,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:35:03,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:35:03,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:35:03,517 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:35:03,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:35:03,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:35:03,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:35:03,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:35:03,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:35:03,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:35:03,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:35:03,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:35:03,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:35:03,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:35:03,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:35:03,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:35:03,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:35:03,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:35:03,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:35:03,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:35:03,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:35:03,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:35:03,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:35:03,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:35:03,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:35:03,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:35:03,521 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:35:03,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:35:03,521 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:35:03,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:35:03,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:35:03,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:35:03,845 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:35:03,846 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:35:03,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl [2021-07-13 20:35:03,847 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl' [2021-07-13 20:35:03,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:35:03,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:35:03,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:35:03,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:35:03,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:35:03,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:35:03,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:35:03,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:35:03,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:35:03,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/1) ... [2021-07-13 20:35:03,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:35:03,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:35:03,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:35:03,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:35:03,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (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 [2021-07-13 20:35:03,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:35:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:35:03,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:35:04,000 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:35:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:35:04,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:35:04,000 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:35:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:35:04,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:35:04,000 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:35:04,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:35:04,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:35:04,003 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:35:04,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:35:04,238 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:35:04,240 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:35:04 BoogieIcfgContainer [2021-07-13 20:35:04,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:35:04,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:35:04,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:35:04,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:35:04,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:35:03" (1/2) ... [2021-07-13 20:35:04,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee2421 and model type min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:35:04, skipping insertion in model container [2021-07-13 20:35:04,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:35:04" (2/2) ... [2021-07-13 20:35:04,247 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array-hom.wvr.bpl [2021-07-13 20:35:04,267 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:35:04,267 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:35:04,267 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:35:04,268 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:35:04,325 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:35:04,345 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:35:04,362 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:35:04,362 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:35:04,362 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:35:04,362 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:35:04,363 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:35:04,363 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:35:04,363 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:35:04,363 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:35:04,371 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-13 20:35:04,400 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) [2021-07-13 20:35:04,403 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) [2021-07-13 20:35:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:35:04,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:04,411 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:04,412 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash -234684100, now seen corresponding path program 1 times [2021-07-13 20:35:04,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:04,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193985369] [2021-07-13 20:35:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:04,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:04,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193985369] [2021-07-13 20:35:04,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193985369] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:35:04,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:35:04,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:35:04,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967357932] [2021-07-13 20:35:04,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:35:04,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:35:04,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:35:04,582 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) [2021-07-13 20:35:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:04,612 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-13 20:35:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:35:04,613 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 [2021-07-13 20:35:04,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:04,623 INFO L225 Difference]: With dead ends: 217 [2021-07-13 20:35:04,623 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 20:35:04,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:35:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 20:35:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-13 20:35:04,664 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) [2021-07-13 20:35:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-13 20:35:04,668 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-13 20:35:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:04,669 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-13 20:35:04,669 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) [2021-07-13 20:35:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-13 20:35:04,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:35:04,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:04,671 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] [2021-07-13 20:35:04,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:35:04,672 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:04,672 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-07-13 20:35:04,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:04,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157789634] [2021-07-13 20:35:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:04,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:04,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157789634] [2021-07-13 20:35:04,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157789634] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:35:04,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:35:04,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:35:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269779247] [2021-07-13 20:35:04,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:35:04,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:04,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:35:04,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:35:04,721 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) [2021-07-13 20:35:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:04,757 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-13 20:35:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:35:04,759 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 [2021-07-13 20:35:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:04,761 INFO L225 Difference]: With dead ends: 158 [2021-07-13 20:35:04,761 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:35:04,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:35:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:35:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-13 20:35:04,784 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) [2021-07-13 20:35:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-13 20:35:04,785 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-13 20:35:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:04,786 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-13 20:35:04,786 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) [2021-07-13 20:35:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-13 20:35:04,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:35:04,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:04,787 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] [2021-07-13 20:35:04,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:35:04,788 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:04,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1176026010, now seen corresponding path program 1 times [2021-07-13 20:35:04,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:04,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247206969] [2021-07-13 20:35:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:04,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:04,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247206969] [2021-07-13 20:35:04,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247206969] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:35:04,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:35:04,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:35:04,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230620946] [2021-07-13 20:35:04,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:35:04,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:35:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:35:04,830 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) [2021-07-13 20:35:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:04,889 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-13 20:35:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:35:04,893 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 [2021-07-13 20:35:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:04,894 INFO L225 Difference]: With dead ends: 183 [2021-07-13 20:35:04,894 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 20:35:04,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:35:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 20:35:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-13 20:35:04,907 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) [2021-07-13 20:35:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-13 20:35:04,909 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-13 20:35:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:04,909 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-13 20:35:04,909 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) [2021-07-13 20:35:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-13 20:35:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:35:04,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:04,911 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] [2021-07-13 20:35:04,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:35:04,911 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:04,912 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-07-13 20:35:04,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:04,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116985755] [2021-07-13 20:35:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:05,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:05,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116985755] [2021-07-13 20:35:05,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116985755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:05,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392515328] [2021-07-13 20:35:05,374 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 [2021-07-13 20:35:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:35:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,901 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-07-13 20:35:05,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,908 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:35:05,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:05,912 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:35:05,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:05,929 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:97, output treesize:21 [2021-07-13 20:35:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:05,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392515328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:05,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:05,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:35:05,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116632426] [2021-07-13 20:35:05,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:05,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:05,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:05,967 INFO L87 Difference]: Start difference. First operand 158 states and 448 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) [2021-07-13 20:35:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:06,235 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-13 20:35:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:35:06,236 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 [2021-07-13 20:35:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:06,238 INFO L225 Difference]: With dead ends: 330 [2021-07-13 20:35:06,239 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:35:06,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 457.0ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:35:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-13 20:35:06,252 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) [2021-07-13 20:35:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-13 20:35:06,255 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-13 20:35:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:06,255 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-13 20:35:06,255 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) [2021-07-13 20:35:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-13 20:35:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:35:06,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:06,257 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] [2021-07-13 20:35:06,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:06,478 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-07-13 20:35:06,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:06,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330897922] [2021-07-13 20:35:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:06,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:06,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330897922] [2021-07-13 20:35:06,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330897922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:06,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682035435] [2021-07-13 20:35:06,808 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 [2021-07-13 20:35:06,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:06,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:06,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:35:06,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:07,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:07,147 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 [2021-07-13 20:35:07,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,172 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:07,172 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 [2021-07-13 20:35:07,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,200 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:07,201 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 [2021-07-13 20:35:07,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:07,215 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 [2021-07-13 20:35:07,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:07,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:07,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:35:07,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:122 [2021-07-13 20:35:07,436 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-07-13 20:35:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:07,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682035435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:07,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:07,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 20:35:07,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281413568] [2021-07-13 20:35:07,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:35:07,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:07,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:35:07,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:35:07,526 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) [2021-07-13 20:35:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:08,125 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-13 20:35:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:35:08,126 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 [2021-07-13 20:35:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:08,129 INFO L225 Difference]: With dead ends: 374 [2021-07-13 20:35:08,129 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 20:35:08,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 833.7ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 20:35:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-13 20:35:08,139 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) [2021-07-13 20:35:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-13 20:35:08,141 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-13 20:35:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:08,141 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-13 20:35:08,141 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) [2021-07-13 20:35:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-13 20:35:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:35:08,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:08,143 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] [2021-07-13 20:35:08,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:35:08,357 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-07-13 20:35:08,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:08,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316064959] [2021-07-13 20:35:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:08,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:08,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316064959] [2021-07-13 20:35:08,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316064959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:08,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883550119] [2021-07-13 20:35:08,572 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 [2021-07-13 20:35:08,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:35:08,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:08,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:35:08,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:08,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:08,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:08,805 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:35:08,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:08,817 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 20:35:08,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,863 INFO L628 ElimStorePlain]: treesize reduction 35, result has 56.8 percent of original size [2021-07-13 20:35:08,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:08,867 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:35:08,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:08,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:08,888 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:121, output treesize:21 [2021-07-13 20:35:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:08,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883550119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:08,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:08,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:35:08,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418937597] [2021-07-13 20:35:08,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:35:08,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:08,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:35:08,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:08,935 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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) [2021-07-13 20:35:09,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:09,149 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-07-13 20:35:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:35:09,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 22 [2021-07-13 20:35:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:09,151 INFO L225 Difference]: With dead ends: 296 [2021-07-13 20:35:09,152 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 20:35:09,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:35:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 20:35:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-07-13 20:35:09,160 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) [2021-07-13 20:35:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-13 20:35:09,161 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-13 20:35:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:09,161 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-13 20:35:09,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) 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) [2021-07-13 20:35:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-13 20:35:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:35:09,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:09,164 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] [2021-07-13 20:35:09,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:35:09,388 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:09,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-07-13 20:35:09,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:09,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573568717] [2021-07-13 20:35:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:09,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:09,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573568717] [2021-07-13 20:35:09,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573568717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:09,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501605708] [2021-07-13 20:35:09,610 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 [2021-07-13 20:35:09,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:09,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:09,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:35:09,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:09,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:09,865 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 [2021-07-13 20:35:09,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:09,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:09,877 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 [2021-07-13 20:35:09,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:09,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:09,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:09,978 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 [2021-07-13 20:35:09,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:09,996 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:09,996 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 [2021-07-13 20:35:09,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:10,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:10,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:35:10,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:98 [2021-07-13 20:35:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:10,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501605708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:10,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:10,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:35:10,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472732851] [2021-07-13 20:35:10,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:35:10,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:10,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:35:10,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:10,214 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-07-13 20:35:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:10,569 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-07-13 20:35:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:35:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 22 [2021-07-13 20:35:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:10,572 INFO L225 Difference]: With dead ends: 409 [2021-07-13 20:35:10,572 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 20:35:10,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 537.6ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:35:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 20:35:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-07-13 20:35:10,580 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) [2021-07-13 20:35:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-13 20:35:10,581 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-13 20:35:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:10,583 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-13 20:35:10,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-07-13 20:35:10,587 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-13 20:35:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:10,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:10,589 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] [2021-07-13 20:35:10,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:10,797 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-07-13 20:35:10,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:10,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111150336] [2021-07-13 20:35:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:10,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:10,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111150336] [2021-07-13 20:35:10,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111150336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:10,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178703485] [2021-07-13 20:35:10,849 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 [2021-07-13 20:35:10,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:10,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:10,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178703485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:10,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:10,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:35:10,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223769553] [2021-07-13 20:35:10,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:35:10,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:35:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:10,994 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) [2021-07-13 20:35:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:11,467 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-13 20:35:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:35:11,468 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 [2021-07-13 20:35:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:11,471 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:35:11,471 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 20:35:11,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:35:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 20:35:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-13 20:35:11,481 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) [2021-07-13 20:35:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-13 20:35:11,482 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-13 20:35:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:11,483 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-13 20:35:11,483 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) [2021-07-13 20:35:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-13 20:35:11,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:11,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:11,485 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] [2021-07-13 20:35:11,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:35:11,709 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-07-13 20:35:11,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:11,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388183570] [2021-07-13 20:35:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:11,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388183570] [2021-07-13 20:35:11,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388183570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153882350] [2021-07-13 20:35:11,751 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 [2021-07-13 20:35:11,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:11,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:11,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:11,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:11,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153882350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:11,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:11,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:11,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654177435] [2021-07-13 20:35:11,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:11,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:11,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:11,892 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) [2021-07-13 20:35:12,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:12,724 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-13 20:35:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:35:12,724 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 [2021-07-13 20:35:12,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:12,730 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:35:12,730 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:35:12,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 503.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:35:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:35:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-13 20:35:12,744 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) [2021-07-13 20:35:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-13 20:35:12,746 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-13 20:35:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:12,746 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-13 20:35:12,746 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) [2021-07-13 20:35:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-13 20:35:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:12,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:12,748 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] [2021-07-13 20:35:12,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:12,973 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:12,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-07-13 20:35:12,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:12,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471486859] [2021-07-13 20:35:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:13,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:13,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471486859] [2021-07-13 20:35:13,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471486859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:13,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411038225] [2021-07-13 20:35:13,021 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 [2021-07-13 20:35:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:13,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:13,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411038225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:13,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:13,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:13,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911319485] [2021-07-13 20:35:13,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:13,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:13,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:13,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:13,165 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) [2021-07-13 20:35:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:13,907 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-13 20:35:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:35:13,908 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 [2021-07-13 20:35:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:13,913 INFO L225 Difference]: With dead ends: 951 [2021-07-13 20:35:13,913 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:35:13,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:35:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:35:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-13 20:35:13,926 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) [2021-07-13 20:35:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-13 20:35:13,927 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-13 20:35:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:13,928 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-13 20:35:13,929 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) [2021-07-13 20:35:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-13 20:35:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:13,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:13,930 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] [2021-07-13 20:35:14,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:14,145 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-07-13 20:35:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:14,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205499295] [2021-07-13 20:35:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:14,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:14,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205499295] [2021-07-13 20:35:14,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205499295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:14,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618483928] [2021-07-13 20:35:14,180 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 [2021-07-13 20:35:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:14,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:35:14,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:14,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618483928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:14,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:14,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:35:14,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327551867] [2021-07-13 20:35:14,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:35:14,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:14,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:35:14,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:35:14,264 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) [2021-07-13 20:35:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:14,384 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-13 20:35:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:35:14,390 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 [2021-07-13 20:35:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:14,393 INFO L225 Difference]: With dead ends: 669 [2021-07-13 20:35:14,394 INFO L226 Difference]: Without dead ends: 663 [2021-07-13 20:35:14,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-13 20:35:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-13 20:35:14,406 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) [2021-07-13 20:35:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-13 20:35:14,408 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-13 20:35:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:14,408 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-13 20:35:14,408 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) [2021-07-13 20:35:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-13 20:35:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:14,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:14,410 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] [2021-07-13 20:35:14,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:35:14,625 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-07-13 20:35:14,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:14,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702508994] [2021-07-13 20:35:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:14,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702508994] [2021-07-13 20:35:14,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702508994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965049409] [2021-07-13 20:35:14,673 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 [2021-07-13 20:35:14,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:14,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:14,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:14,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:14,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965049409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:14,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:14,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:35:14,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928399134] [2021-07-13 20:35:14,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:14,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:14,795 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) [2021-07-13 20:35:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:14,973 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-13 20:35:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:35:14,973 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 [2021-07-13 20:35:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:14,976 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:35:14,976 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:35:14,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:35:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:35:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-13 20:35:14,988 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) [2021-07-13 20:35:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-13 20:35:14,989 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-13 20:35:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:14,990 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-13 20:35:14,990 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) [2021-07-13 20:35:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-13 20:35:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:14,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:14,991 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] [2021-07-13 20:35:15,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:15,205 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:15,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-07-13 20:35:15,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:15,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765997265] [2021-07-13 20:35:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:15,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:15,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765997265] [2021-07-13 20:35:15,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765997265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:15,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811080636] [2021-07-13 20:35:15,238 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 [2021-07-13 20:35:15,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:15,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:35:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:15,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811080636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:15,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:15,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:35:15,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856583773] [2021-07-13 20:35:15,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:35:15,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:15,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:35:15,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:35:15,328 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) [2021-07-13 20:35:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:15,430 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-13 20:35:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:35:15,431 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 [2021-07-13 20:35:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:15,435 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:35:15,435 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:35:15,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:35:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-13 20:35:15,449 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) [2021-07-13 20:35:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-13 20:35:15,451 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-13 20:35:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:15,451 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-13 20:35:15,451 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) [2021-07-13 20:35:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-13 20:35:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:15,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:15,453 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] [2021-07-13 20:35:15,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:15,677 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-07-13 20:35:15,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:15,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812368751] [2021-07-13 20:35:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:15,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812368751] [2021-07-13 20:35:15,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812368751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626510007] [2021-07-13 20:35:15,724 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 [2021-07-13 20:35:15,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:15,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:15,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:15,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:15,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626510007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:15,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:15,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:35:15,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988722233] [2021-07-13 20:35:15,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:35:15,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:15,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:35:15,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:35:15,852 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) [2021-07-13 20:35:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:16,141 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-13 20:35:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:35:16,141 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 [2021-07-13 20:35:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:16,147 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 20:35:16,147 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:35:16,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:35:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:35:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-13 20:35:16,165 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) [2021-07-13 20:35:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-13 20:35:16,167 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-13 20:35:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:16,167 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-13 20:35:16,167 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) [2021-07-13 20:35:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-13 20:35:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:16,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:16,169 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] [2021-07-13 20:35:16,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:35:16,392 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-07-13 20:35:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:16,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147281506] [2021-07-13 20:35:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:16,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147281506] [2021-07-13 20:35:16,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147281506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731021159] [2021-07-13 20:35:16,433 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 [2021-07-13 20:35:16,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:16,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:16,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:16,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:16,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731021159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:16,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:16,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:35:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111510478] [2021-07-13 20:35:16,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:35:16,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:16,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:35:16,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:35:16,561 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) [2021-07-13 20:35:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:16,988 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-13 20:35:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:35:16,988 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 [2021-07-13 20:35:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:16,994 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 20:35:16,995 INFO L226 Difference]: Without dead ends: 1492 [2021-07-13 20:35:16,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:35:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-13 20:35:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-13 20:35:17,018 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) [2021-07-13 20:35:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-13 20:35:17,020 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-13 20:35:17,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:17,020 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-13 20:35:17,020 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) [2021-07-13 20:35:17,020 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-13 20:35:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:17,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:17,022 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] [2021-07-13 20:35:17,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:35:17,237 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-07-13 20:35:17,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:17,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074270341] [2021-07-13 20:35:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:17,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:17,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074270341] [2021-07-13 20:35:17,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074270341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:17,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036674596] [2021-07-13 20:35:17,275 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 [2021-07-13 20:35:17,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:17,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036674596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:17,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:17,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:35:17,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746606510] [2021-07-13 20:35:17,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:17,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:17,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:17,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:17,396 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) [2021-07-13 20:35:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:17,699 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-13 20:35:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:35:17,699 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 [2021-07-13 20:35:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:17,705 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:35:17,705 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:35:17,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:35:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:35:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-13 20:35:17,730 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) [2021-07-13 20:35:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-13 20:35:17,732 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-13 20:35:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:17,733 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-13 20:35:17,733 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) [2021-07-13 20:35:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-13 20:35:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:17,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:17,735 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] [2021-07-13 20:35:17,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 20:35:17,949 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-07-13 20:35:17,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:17,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436470240] [2021-07-13 20:35:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:17,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436470240] [2021-07-13 20:35:17,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436470240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528702509] [2021-07-13 20:35:17,992 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 [2021-07-13 20:35:18,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:18,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:18,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:18,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528702509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:18,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:18,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:35:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179457051] [2021-07-13 20:35:18,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:18,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:18,114 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) [2021-07-13 20:35:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:18,401 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-13 20:35:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:35:18,401 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 [2021-07-13 20:35:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:18,407 INFO L225 Difference]: With dead ends: 1329 [2021-07-13 20:35:18,407 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 20:35:18,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 20:35:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-13 20:35:18,427 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) [2021-07-13 20:35:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-13 20:35:18,429 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-13 20:35:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:18,430 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-13 20:35:18,430 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) [2021-07-13 20:35:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-13 20:35:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:18,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:18,432 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] [2021-07-13 20:35:18,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:18,645 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-07-13 20:35:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:18,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504055772] [2021-07-13 20:35:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:18,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:18,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504055772] [2021-07-13 20:35:18,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504055772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:18,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338876749] [2021-07-13 20:35:18,690 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 [2021-07-13 20:35:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:18,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:18,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338876749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:18,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:18,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:35:18,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108771120] [2021-07-13 20:35:18,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:35:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:35:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:35:18,799 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) [2021-07-13 20:35:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:19,164 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-13 20:35:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:35:19,164 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 [2021-07-13 20:35:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:19,171 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:35:19,172 INFO L226 Difference]: Without dead ends: 1544 [2021-07-13 20:35:19,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:35:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-13 20:35:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-13 20:35:19,196 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) [2021-07-13 20:35:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-13 20:35:19,198 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-13 20:35:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:19,198 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-13 20:35:19,198 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) [2021-07-13 20:35:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-13 20:35:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:19,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:19,200 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] [2021-07-13 20:35:19,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:19,421 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:19,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-07-13 20:35:19,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:19,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882872125] [2021-07-13 20:35:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:19,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:19,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882872125] [2021-07-13 20:35:19,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882872125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:19,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034487294] [2021-07-13 20:35:19,456 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 [2021-07-13 20:35:19,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:19,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:19,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:19,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:19,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034487294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:19,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:19,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:19,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877167316] [2021-07-13 20:35:19,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:19,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:19,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:19,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:19,580 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) [2021-07-13 20:35:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:20,363 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-13 20:35:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:35:20,364 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 [2021-07-13 20:35:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:20,376 INFO L225 Difference]: With dead ends: 2734 [2021-07-13 20:35:20,376 INFO L226 Difference]: Without dead ends: 2734 [2021-07-13 20:35:20,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:35:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-13 20:35:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-13 20:35:20,416 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) [2021-07-13 20:35:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-13 20:35:20,419 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-13 20:35:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:20,419 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-13 20:35:20,419 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) [2021-07-13 20:35:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-13 20:35:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:20,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:20,421 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] [2021-07-13 20:35:20,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:20,645 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-07-13 20:35:20,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:20,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893549355] [2021-07-13 20:35:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:20,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893549355] [2021-07-13 20:35:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893549355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804305784] [2021-07-13 20:35:20,689 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 [2021-07-13 20:35:20,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:20,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:20,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804305784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:20,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:20,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:20,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742420601] [2021-07-13 20:35:20,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:20,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:20,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:20,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:20,841 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) [2021-07-13 20:35:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:21,585 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-13 20:35:21,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:35:21,586 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 [2021-07-13 20:35:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:21,594 INFO L225 Difference]: With dead ends: 2693 [2021-07-13 20:35:21,594 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 20:35:21,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 448.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:35:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 20:35:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-13 20:35:21,631 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) [2021-07-13 20:35:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-13 20:35:21,633 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-13 20:35:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:21,634 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-13 20:35:21,634 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) [2021-07-13 20:35:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-13 20:35:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:21,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:21,636 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] [2021-07-13 20:35:21,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:35:21,857 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-07-13 20:35:21,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:21,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483068319] [2021-07-13 20:35:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:21,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483068319] [2021-07-13 20:35:21,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483068319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767841746] [2021-07-13 20:35:21,897 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:21,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:21,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:21,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:21,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767841746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:21,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:21,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:35:22,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129613686] [2021-07-13 20:35:22,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:35:22,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:35:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:22,001 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) [2021-07-13 20:35:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:22,690 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-13 20:35:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:35:22,690 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 [2021-07-13 20:35:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:22,697 INFO L225 Difference]: With dead ends: 2677 [2021-07-13 20:35:22,698 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 20:35:22,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:35:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 20:35:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-13 20:35:22,733 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) [2021-07-13 20:35:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-13 20:35:22,736 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-13 20:35:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:22,737 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-13 20:35:22,737 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) [2021-07-13 20:35:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-13 20:35:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:22,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:22,739 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] [2021-07-13 20:35:22,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:35:22,963 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-07-13 20:35:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:22,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504174571] [2021-07-13 20:35:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:22,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:22,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504174571] [2021-07-13 20:35:22,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504174571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:22,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411970133] [2021-07-13 20:35:22,997 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 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 [2021-07-13 20:35:23,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:35:23,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:23,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:23,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411970133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:23,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:23,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:35:23,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093789687] [2021-07-13 20:35:23,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:35:23,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:35:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:23,095 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) [2021-07-13 20:35:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:23,714 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-13 20:35:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:35:23,715 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 [2021-07-13 20:35:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:23,721 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 20:35:23,721 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:35:23,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 360.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:35:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:35:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-13 20:35:23,753 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) [2021-07-13 20:35:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-13 20:35:23,755 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-13 20:35:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:23,756 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-13 20:35:23,756 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) [2021-07-13 20:35:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-13 20:35:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:23,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:23,758 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] [2021-07-13 20:35:23,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:35:23,980 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:23,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-07-13 20:35:23,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:23,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92348299] [2021-07-13 20:35:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:24,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:24,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92348299] [2021-07-13 20:35:24,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92348299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:24,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149801717] [2021-07-13 20:35:24,019 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 [2021-07-13 20:35:24,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:35:24,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149801717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:24,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:24,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:24,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911867834] [2021-07-13 20:35:24,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:24,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:24,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:24,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:24,139 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) [2021-07-13 20:35:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:24,820 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-13 20:35:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:35:24,821 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 [2021-07-13 20:35:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:24,827 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 20:35:24,828 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 20:35:24,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:35:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 20:35:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-13 20:35:24,858 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) [2021-07-13 20:35:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-13 20:35:24,862 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-13 20:35:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:24,862 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-13 20:35:24,862 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) [2021-07-13 20:35:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-13 20:35:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:24,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:24,867 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] [2021-07-13 20:35:25,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:35:25,092 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:25,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-07-13 20:35:25,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:25,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510174104] [2021-07-13 20:35:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:25,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:25,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510174104] [2021-07-13 20:35:25,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510174104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:25,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615765628] [2021-07-13 20:35:25,130 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 [2021-07-13 20:35:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:25,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615765628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:25,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:25,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:25,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470991305] [2021-07-13 20:35:25,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:25,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:25,255 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) [2021-07-13 20:35:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:25,921 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-13 20:35:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:35:25,922 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 [2021-07-13 20:35:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:25,928 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:35:25,928 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 20:35:25,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:35:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 20:35:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-13 20:35:25,957 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) [2021-07-13 20:35:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-13 20:35:25,960 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-13 20:35:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:25,960 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-13 20:35:25,960 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) [2021-07-13 20:35:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-13 20:35:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:25,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:25,962 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] [2021-07-13 20:35:26,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:35:26,177 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:26,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-07-13 20:35:26,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:26,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312184556] [2021-07-13 20:35:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:26,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:26,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312184556] [2021-07-13 20:35:26,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312184556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:26,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663585402] [2021-07-13 20:35:26,206 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 [2021-07-13 20:35:26,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:35:26,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:35:26,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:26,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663585402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:26,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:26,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:35:26,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238055281] [2021-07-13 20:35:26,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:35:26,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:26,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:35:26,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:35:26,283 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) [2021-07-13 20:35:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:26,358 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-13 20:35:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:35:26,359 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 [2021-07-13 20:35:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:26,361 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:35:26,361 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:35:26,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:35:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-13 20:35:26,376 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) [2021-07-13 20:35:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-13 20:35:26,378 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-13 20:35:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:26,378 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-13 20:35:26,379 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) [2021-07-13 20:35:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-13 20:35:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:26,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:26,380 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] [2021-07-13 20:35:26,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:26,597 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:26,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-07-13 20:35:26,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:26,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342022107] [2021-07-13 20:35:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:26,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:26,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342022107] [2021-07-13 20:35:26,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342022107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:26,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347847713] [2021-07-13 20:35:26,635 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 [2021-07-13 20:35:26,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:26,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:26,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:26,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347847713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:26,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:26,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:35:26,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259721534] [2021-07-13 20:35:26,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:35:26,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:26,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:35:26,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:35:26,707 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) [2021-07-13 20:35:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:26,988 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-13 20:35:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:35:26,989 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 [2021-07-13 20:35:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:26,992 INFO L225 Difference]: With dead ends: 1555 [2021-07-13 20:35:26,992 INFO L226 Difference]: Without dead ends: 1555 [2021-07-13 20:35:26,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-13 20:35:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-13 20:35:27,012 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) [2021-07-13 20:35:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-13 20:35:27,015 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-13 20:35:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:27,015 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-13 20:35:27,015 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) [2021-07-13 20:35:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-13 20:35:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:27,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:27,017 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] [2021-07-13 20:35:27,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:27,232 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:27,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:27,232 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-07-13 20:35:27,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:27,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057739583] [2021-07-13 20:35:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:27,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:27,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057739583] [2021-07-13 20:35:27,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057739583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:27,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852021834] [2021-07-13 20:35:27,261 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 [2021-07-13 20:35:27,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:27,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:27,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:27,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:27,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852021834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:27,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:27,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:35:27,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221007287] [2021-07-13 20:35:27,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:35:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:35:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:35:27,338 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) [2021-07-13 20:35:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:27,573 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-13 20:35:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:35:27,573 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 [2021-07-13 20:35:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:27,577 INFO L225 Difference]: With dead ends: 1605 [2021-07-13 20:35:27,577 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:35:27,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:35:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:35:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-13 20:35:27,598 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) [2021-07-13 20:35:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-13 20:35:27,601 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-13 20:35:27,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:27,601 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-13 20:35:27,601 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) [2021-07-13 20:35:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-13 20:35:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:27,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:27,603 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] [2021-07-13 20:35:27,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:27,826 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:27,826 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-07-13 20:35:27,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:27,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960334137] [2021-07-13 20:35:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:27,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:27,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960334137] [2021-07-13 20:35:27,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960334137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:27,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046132028] [2021-07-13 20:35:27,856 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 [2021-07-13 20:35:27,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:27,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:27,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:35:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046132028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:27,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:27,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:35:27,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536807787] [2021-07-13 20:35:27,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:35:27,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:27,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:35:27,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:35:27,927 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) [2021-07-13 20:35:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:28,125 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-13 20:35:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:35:28,125 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 [2021-07-13 20:35:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:28,128 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:35:28,128 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 20:35:28,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:35:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 20:35:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-13 20:35:28,148 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) [2021-07-13 20:35:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-13 20:35:28,150 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-13 20:35:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:28,150 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-13 20:35:28,151 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) [2021-07-13 20:35:28,151 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-13 20:35:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:28,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:28,153 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] [2021-07-13 20:35:28,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 20:35:28,365 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-07-13 20:35:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:28,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758536753] [2021-07-13 20:35:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:28,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:28,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758536753] [2021-07-13 20:35:28,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758536753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:28,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565458493] [2021-07-13 20:35:28,404 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 [2021-07-13 20:35:28,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:28,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:28,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565458493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:28,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:28,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:35:28,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818244963] [2021-07-13 20:35:28,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:35:28,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:28,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:35:28,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:35:28,477 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) [2021-07-13 20:35:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:28,684 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-13 20:35:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:35:28,684 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 [2021-07-13 20:35:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:28,687 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 20:35:28,687 INFO L226 Difference]: Without dead ends: 1496 [2021-07-13 20:35:28,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:35:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-13 20:35:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-13 20:35:28,703 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) [2021-07-13 20:35:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-13 20:35:28,705 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-13 20:35:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:28,706 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-13 20:35:28,706 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) [2021-07-13 20:35:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-13 20:35:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:28,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:28,708 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] [2021-07-13 20:35:28,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:28,912 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-07-13 20:35:28,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:28,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416454097] [2021-07-13 20:35:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:28,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:28,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416454097] [2021-07-13 20:35:28,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416454097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:28,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134559180] [2021-07-13 20:35:28,950 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 [2021-07-13 20:35:28,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:28,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:28,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:29,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134559180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:29,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:29,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:29,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461981610] [2021-07-13 20:35:29,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:29,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:29,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:29,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:29,047 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) [2021-07-13 20:35:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:29,557 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-13 20:35:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:35:29,557 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 [2021-07-13 20:35:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:29,563 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:35:29,563 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 20:35:29,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:35:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 20:35:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-13 20:35:29,591 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) [2021-07-13 20:35:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-13 20:35:29,594 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-13 20:35:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:29,594 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-13 20:35:29,594 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) [2021-07-13 20:35:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-13 20:35:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:29,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:29,596 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] [2021-07-13 20:35:29,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:35:29,813 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-07-13 20:35:29,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:29,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904014311] [2021-07-13 20:35:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:29,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:29,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904014311] [2021-07-13 20:35:29,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904014311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:29,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702407431] [2021-07-13 20:35:29,855 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 [2021-07-13 20:35:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:29,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702407431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:29,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:29,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:29,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442770816] [2021-07-13 20:35:29,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:29,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:29,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:29,985 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) [2021-07-13 20:35:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:30,434 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-13 20:35:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:35:30,435 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 [2021-07-13 20:35:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:30,440 INFO L225 Difference]: With dead ends: 2335 [2021-07-13 20:35:30,440 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 20:35:30,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:35:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 20:35:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-13 20:35:30,469 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) [2021-07-13 20:35:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:35:30,472 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:35:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:30,472 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:35:30,472 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) [2021-07-13 20:35:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:35:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:30,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:30,474 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] [2021-07-13 20:35:30,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:30,701 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-07-13 20:35:30,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:30,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294606098] [2021-07-13 20:35:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:30,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:30,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294606098] [2021-07-13 20:35:30,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294606098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:30,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783189998] [2021-07-13 20:35:30,744 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) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:30,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:30,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:30,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:30,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783189998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:30,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:30,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:35:30,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817723545] [2021-07-13 20:35:30,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:35:30,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:30,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:35:30,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:30,856 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) [2021-07-13 20:35:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:31,305 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-13 20:35:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:35:31,306 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 [2021-07-13 20:35:31,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:31,310 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 20:35:31,310 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:35:31,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:35:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:35:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-13 20:35:31,349 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) [2021-07-13 20:35:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:35:31,352 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:35:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:31,352 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:35:31,352 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) [2021-07-13 20:35:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:35:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:31,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:31,354 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] [2021-07-13 20:35:31,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:35:31,577 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-07-13 20:35:31,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:31,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617961000] [2021-07-13 20:35:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:31,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:31,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617961000] [2021-07-13 20:35:31,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617961000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:31,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937221115] [2021-07-13 20:35:31,615 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 [2021-07-13 20:35:31,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:31,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:31,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:31,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937221115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:31,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:31,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:35:31,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152992515] [2021-07-13 20:35:31,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:35:31,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:31,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:35:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:31,711 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) [2021-07-13 20:35:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:32,079 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-13 20:35:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:35:32,079 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 [2021-07-13 20:35:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:32,083 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 20:35:32,083 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 20:35:32,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:35:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 20:35:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-13 20:35:32,104 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) [2021-07-13 20:35:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:35:32,107 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:35:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:32,107 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:35:32,107 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) [2021-07-13 20:35:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:35:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:32,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:32,109 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] [2021-07-13 20:35:32,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:32,323 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-07-13 20:35:32,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:32,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39073920] [2021-07-13 20:35:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:32,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:32,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39073920] [2021-07-13 20:35:32,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39073920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:32,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414788882] [2021-07-13 20:35:32,367 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 [2021-07-13 20:35:32,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:32,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:32,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:32,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414788882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:32,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:32,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:32,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972639841] [2021-07-13 20:35:32,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:32,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:32,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:32,482 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) [2021-07-13 20:35:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:32,870 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-13 20:35:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:35:32,870 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 [2021-07-13 20:35:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:32,874 INFO L225 Difference]: With dead ends: 2199 [2021-07-13 20:35:32,874 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 20:35:32,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:35:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 20:35:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-13 20:35:32,894 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) [2021-07-13 20:35:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:35:32,897 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:35:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:32,897 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:35:32,897 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) [2021-07-13 20:35:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:35:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:32,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:32,900 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] [2021-07-13 20:35:33,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:35:33,113 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-07-13 20:35:33,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:33,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490674971] [2021-07-13 20:35:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:33,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:33,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490674971] [2021-07-13 20:35:33,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490674971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:33,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492685604] [2021-07-13 20:35:33,152 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) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:33,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:33,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:33,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:33,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:33,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492685604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:33,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:33,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:33,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175650465] [2021-07-13 20:35:33,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:33,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:33,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:33,274 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) [2021-07-13 20:35:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:33,665 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-13 20:35:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:35:33,665 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 [2021-07-13 20:35:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:33,668 INFO L225 Difference]: With dead ends: 2156 [2021-07-13 20:35:33,669 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:35:33,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:35:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:35:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-13 20:35:33,690 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) [2021-07-13 20:35:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:35:33,692 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:35:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:33,692 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:35:33,692 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) [2021-07-13 20:35:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:35:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:33,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:33,694 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] [2021-07-13 20:35:33,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:35:33,909 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:33,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:33,909 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-07-13 20:35:33,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:33,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473870091] [2021-07-13 20:35:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:33,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:33,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473870091] [2021-07-13 20:35:33,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473870091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:33,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257322016] [2021-07-13 20:35:33,941 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 [2021-07-13 20:35:33,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:33,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:33,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:34,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257322016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:34,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:34,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:35:34,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926806697] [2021-07-13 20:35:34,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:35:34,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:34,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:35:34,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:35:34,027 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) [2021-07-13 20:35:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:34,377 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-13 20:35:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:35:34,377 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 [2021-07-13 20:35:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:34,381 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:35:34,381 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 20:35:34,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:35:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 20:35:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-13 20:35:34,398 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) [2021-07-13 20:35:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-13 20:35:34,400 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-13 20:35:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:34,401 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-13 20:35:34,401 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) [2021-07-13 20:35:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-13 20:35:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:34,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:34,403 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] [2021-07-13 20:35:34,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:34,603 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:34,604 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-07-13 20:35:34,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:34,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085342482] [2021-07-13 20:35:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:34,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085342482] [2021-07-13 20:35:34,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085342482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701221658] [2021-07-13 20:35:34,638 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 [2021-07-13 20:35:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:34,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:34,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:34,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701221658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:34,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:34,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:35:34,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888287520] [2021-07-13 20:35:34,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:35:34,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:34,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:35:34,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:35:34,715 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) [2021-07-13 20:35:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:34,993 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-13 20:35:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:35:34,993 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 [2021-07-13 20:35:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:34,996 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:35:34,996 INFO L226 Difference]: Without dead ends: 1959 [2021-07-13 20:35:34,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:35:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-13 20:35:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-13 20:35:35,018 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) [2021-07-13 20:35:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-13 20:35:35,021 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-13 20:35:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:35,021 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-13 20:35:35,021 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) [2021-07-13 20:35:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-13 20:35:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:35,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:35,023 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] [2021-07-13 20:35:35,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:35,246 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-07-13 20:35:35,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:35,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151747418] [2021-07-13 20:35:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:35,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:35,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151747418] [2021-07-13 20:35:35,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151747418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:35,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612151551] [2021-07-13 20:35:35,280 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 [2021-07-13 20:35:35,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:35,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:35,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:35,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:35,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612151551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:35,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:35,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:35:35,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438340184] [2021-07-13 20:35:35,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:35:35,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:35,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:35:35,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:35:35,361 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) [2021-07-13 20:35:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:35,554 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-13 20:35:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:35:35,554 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 [2021-07-13 20:35:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:35,557 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:35:35,557 INFO L226 Difference]: Without dead ends: 1716 [2021-07-13 20:35:35,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:35:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-13 20:35:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-13 20:35:35,571 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) [2021-07-13 20:35:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-13 20:35:35,573 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-13 20:35:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:35,573 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-13 20:35:35,573 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) [2021-07-13 20:35:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-13 20:35:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:35,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:35,575 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] [2021-07-13 20:35:35,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:35,777 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-07-13 20:35:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:35,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337098131] [2021-07-13 20:35:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:35,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:35,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337098131] [2021-07-13 20:35:35,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337098131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:35,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267873368] [2021-07-13 20:35:35,811 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 [2021-07-13 20:35:35,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:35,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:35,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:35,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267873368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:35,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:35,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:35,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691097229] [2021-07-13 20:35:35,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:35,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:35,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:35,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:35,914 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) [2021-07-13 20:35:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:36,258 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-13 20:35:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:35:36,259 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 [2021-07-13 20:35:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:36,263 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:35:36,263 INFO L226 Difference]: Without dead ends: 1821 [2021-07-13 20:35:36,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:35:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-13 20:35:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-13 20:35:36,286 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) [2021-07-13 20:35:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-13 20:35:36,289 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-13 20:35:36,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:36,289 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-13 20:35:36,289 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) [2021-07-13 20:35:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-13 20:35:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:36,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:36,292 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] [2021-07-13 20:35:36,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:36,505 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-07-13 20:35:36,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:36,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406084175] [2021-07-13 20:35:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:36,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:36,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406084175] [2021-07-13 20:35:36,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406084175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:36,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405680283] [2021-07-13 20:35:36,540 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 [2021-07-13 20:35:36,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:36,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:36,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:36,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:36,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405680283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:36,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:36,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:35:36,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391037929] [2021-07-13 20:35:36,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:35:36,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:36,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:35:36,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:35:36,644 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) [2021-07-13 20:35:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:36,973 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-13 20:35:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:35:36,973 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 [2021-07-13 20:35:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:36,976 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:35:36,976 INFO L226 Difference]: Without dead ends: 1786 [2021-07-13 20:35:36,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:35:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-13 20:35:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-13 20:35:36,992 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) [2021-07-13 20:35:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-13 20:35:36,995 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-13 20:35:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:36,995 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-13 20:35:36,995 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) [2021-07-13 20:35:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-13 20:35:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:35:36,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:36,997 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] [2021-07-13 20:35:37,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 20:35:37,198 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-07-13 20:35:37,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:37,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534354730] [2021-07-13 20:35:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:37,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:37,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534354730] [2021-07-13 20:35:37,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534354730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:37,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619194119] [2021-07-13 20:35:37,235 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 [2021-07-13 20:35:37,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:37,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:35:37,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:37,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619194119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:37,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:37,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:35:37,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992272129] [2021-07-13 20:35:37,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:35:37,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:37,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:35:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:35:37,343 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) [2021-07-13 20:35:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:37,527 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-13 20:35:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:35:37,527 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 [2021-07-13 20:35:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:37,530 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:35:37,530 INFO L226 Difference]: Without dead ends: 1637 [2021-07-13 20:35:37,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-13 20:35:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-13 20:35:37,544 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) [2021-07-13 20:35:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-13 20:35:37,547 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-13 20:35:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:37,547 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-13 20:35:37,547 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) [2021-07-13 20:35:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-13 20:35:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:37,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:37,550 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] [2021-07-13 20:35:37,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:37,771 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-07-13 20:35:37,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:37,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217245004] [2021-07-13 20:35:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:38,029 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-07-13 20:35:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:38,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217245004] [2021-07-13 20:35:38,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217245004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919816903] [2021-07-13 20:35:38,385 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 [2021-07-13 20:35:38,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:38,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:38,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:35:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:38,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,913 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 33 treesize of output 19 [2021-07-13 20:35:38,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:38,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:38,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:38,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,955 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 26 treesize of output 13 [2021-07-13 20:35:38,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,962 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 28 treesize of output 16 [2021-07-13 20:35:38,963 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:38,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,979 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:35:38,979 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:38,987 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:38,993 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:38,994 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:38,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,000 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:39,001 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:39,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:39,007 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:39,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:39,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:39,013 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:39,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:39,019 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:39,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:39,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:39,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:39,023 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:39,099 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:35:39,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:39,101 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:35:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:39,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919816903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:39,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:39,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:39,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524748933] [2021-07-13 20:35:39,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:39,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:39,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:39,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:39,190 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) [2021-07-13 20:35:39,854 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-07-13 20:35:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:40,141 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-13 20:35:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:35:40,141 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 [2021-07-13 20:35:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:40,143 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 20:35:40,144 INFO L226 Difference]: Without dead ends: 1502 [2021-07-13 20:35:40,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1403.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-13 20:35:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-13 20:35:40,157 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) [2021-07-13 20:35:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-13 20:35:40,159 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-13 20:35:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:40,159 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-13 20:35:40,159 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) [2021-07-13 20:35:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-13 20:35:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:40,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:40,161 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] [2021-07-13 20:35:40,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-13 20:35:40,362 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:40,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:40,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-07-13 20:35:40,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:40,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905445114] [2021-07-13 20:35:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:40,731 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-07-13 20:35:40,852 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-13 20:35:40,979 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-07-13 20:35:41,125 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 20:35:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:41,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905445114] [2021-07-13 20:35:41,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905445114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017603538] [2021-07-13 20:35:41,178 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 [2021-07-13 20:35:41,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:41,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:41,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:41,727 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 20:35:41,800 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_5, v_prenex_7], 3=[v_prenex_9, A]} [2021-07-13 20:35:41,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:41,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:41,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:41,957 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-13 20:35:41,958 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-07-13 20:35:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:41,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:41,963 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:41,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:42,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:42,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,017 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 [2021-07-13 20:35:42,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:42,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:42,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:42,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:42,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:42,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:42,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:42,101 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-07-13 20:35:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:42,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017603538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:42,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:42,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:42,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748133434] [2021-07-13 20:35:42,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:42,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:42,164 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) [2021-07-13 20:35:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:43,018 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-07-13 20:35:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:35:43,018 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 [2021-07-13 20:35:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:43,021 INFO L225 Difference]: With dead ends: 1495 [2021-07-13 20:35:43,021 INFO L226 Difference]: Without dead ends: 1480 [2021-07-13 20:35:43,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1662.3ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-07-13 20:35:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-07-13 20:35:43,034 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) [2021-07-13 20:35:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-13 20:35:43,037 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-13 20:35:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:43,038 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-13 20:35:43,038 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) [2021-07-13 20:35:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-13 20:35:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:43,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:43,040 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] [2021-07-13 20:35:43,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:43,257 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-07-13 20:35:43,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:43,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516611814] [2021-07-13 20:35:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:43,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:43,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516611814] [2021-07-13 20:35:43,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516611814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:43,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291405324] [2021-07-13 20:35:43,892 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 [2021-07-13 20:35:43,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:43,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,616 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 [2021-07-13 20:35:44,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,630 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 [2021-07-13 20:35:44,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,642 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 [2021-07-13 20:35:44,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,653 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 [2021-07-13 20:35:44,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,663 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 [2021-07-13 20:35:44,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:35:44,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,689 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 39 treesize of output 13 [2021-07-13 20:35:44,691 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,701 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 [2021-07-13 20:35:44,702 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,711 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 [2021-07-13 20:35:44,712 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:35:44,723 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,734 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:35:44,735 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,744 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 41 treesize of output 13 [2021-07-13 20:35:44,745 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,755 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 [2021-07-13 20:35:44,757 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,765 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 [2021-07-13 20:35:44,766 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:44,772 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 [2021-07-13 20:35:44,773 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,804 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-13 20:35:44,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:44,806 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:35:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:44,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291405324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:44,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:44,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:35:44,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337584709] [2021-07-13 20:35:44,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:44,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:44,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:44,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:44,847 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 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) [2021-07-13 20:35:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:46,443 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-07-13 20:35:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:35:46,443 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 [2021-07-13 20:35:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:46,447 INFO L225 Difference]: With dead ends: 1607 [2021-07-13 20:35:46,447 INFO L226 Difference]: Without dead ends: 1592 [2021-07-13 20:35:46,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1907.3ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:35:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-13 20:35:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-07-13 20:35:46,462 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) [2021-07-13 20:35:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-13 20:35:46,464 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-13 20:35:46,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:46,464 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-13 20:35:46,464 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) [2021-07-13 20:35:46,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-13 20:35:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:46,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:46,466 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] [2021-07-13 20:35:46,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:35:46,667 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:46,667 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-07-13 20:35:46,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:46,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91166724] [2021-07-13 20:35:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:46,973 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 20:35:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:47,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:47,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91166724] [2021-07-13 20:35:47,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91166724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:47,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227596067] [2021-07-13 20:35:47,166 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 [2021-07-13 20:35:47,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:47,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:35:47,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,498 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:47,498 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 [2021-07-13 20:35:47,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,507 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:47,507 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 [2021-07-13 20:35:47,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:47,517 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 19 [2021-07-13 20:35:47,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,528 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 [2021-07-13 20:35:47,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,546 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 [2021-07-13 20:35:47,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,566 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 [2021-07-13 20:35:47,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,578 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:47,578 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 [2021-07-13 20:35:47,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,593 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 [2021-07-13 20:35:47,598 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,612 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 26 treesize of output 24 [2021-07-13 20:35:47,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,625 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:47,625 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 36 treesize of output 22 [2021-07-13 20:35:47,626 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,635 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:47,635 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 [2021-07-13 20:35:47,636 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:47,644 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 [2021-07-13 20:35:47,645 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,655 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:47,655 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 [2021-07-13 20:35:47,665 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,676 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:47,676 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 [2021-07-13 20:35:47,677 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,688 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:47,688 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 [2021-07-13 20:35:47,689 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:47,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:47,695 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 [2021-07-13 20:35:47,695 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:47,768 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:35:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:47,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227596067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:47,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:47,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:35:47,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926076158] [2021-07-13 20:35:47,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:47,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:47,968 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) [2021-07-13 20:35:48,365 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-07-13 20:35:48,514 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2021-07-13 20:35:48,675 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 20:35:49,109 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-13 20:35:49,234 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-13 20:35:49,375 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-13 20:35:49,677 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-13 20:35:49,824 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-13 20:35:50,038 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-13 20:35:50,296 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-07-13 20:35:50,452 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-13 20:35:50,761 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:35:51,073 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-13 20:35:51,356 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-07-13 20:35:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:51,413 INFO L93 Difference]: Finished difference Result 1842 states and 5907 transitions. [2021-07-13 20:35:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:35:51,414 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 [2021-07-13 20:35:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:51,416 INFO L225 Difference]: With dead ends: 1842 [2021-07-13 20:35:51,417 INFO L226 Difference]: Without dead ends: 1827 [2021-07-13 20:35:51,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3464.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:35:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-07-13 20:35:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1198. [2021-07-13 20:35:51,432 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) [2021-07-13 20:35:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-13 20:35:51,434 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-13 20:35:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:51,434 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-13 20:35:51,435 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) [2021-07-13 20:35:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-13 20:35:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:51,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:51,436 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] [2021-07-13 20:35:51,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:51,637 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-07-13 20:35:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65246779] [2021-07-13 20:35:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:52,016 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-07-13 20:35:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:52,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:52,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65246779] [2021-07-13 20:35:52,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65246779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:52,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560946279] [2021-07-13 20:35:52,142 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 [2021-07-13 20:35:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:52,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:35:52,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:52,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,802 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 41 treesize of output 19 [2021-07-13 20:35:52,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:35:52,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,825 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 32 treesize of output 16 [2021-07-13 20:35:52,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,836 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 [2021-07-13 20:35:52,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,847 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 [2021-07-13 20:35:52,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,857 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 [2021-07-13 20:35:52,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,867 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 [2021-07-13 20:35:52,869 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,878 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 [2021-07-13 20:35:52,879 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,889 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 [2021-07-13 20:35:52,890 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,900 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 [2021-07-13 20:35:52,901 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,910 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 [2021-07-13 20:35:52,911 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,920 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-13 20:35:52,922 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,931 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 [2021-07-13 20:35:52,932 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,941 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 [2021-07-13 20:35:52,942 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,951 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:35:52,952 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:52,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:52,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:52,959 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 [2021-07-13 20:35:52,960 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:53,001 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-13 20:35:53,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:53,002 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-13 20:35:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:53,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560946279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:53,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:53,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:35:53,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205974248] [2021-07-13 20:35:53,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:53,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:53,043 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) [2021-07-13 20:35:53,435 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-07-13 20:35:54,203 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-07-13 20:35:54,356 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2021-07-13 20:35:54,548 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-13 20:35:54,702 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-07-13 20:35:55,168 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-07-13 20:35:55,615 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-07-13 20:35:55,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:55,752 INFO L93 Difference]: Finished difference Result 1797 states and 5747 transitions. [2021-07-13 20:35:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:35:55,752 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 [2021-07-13 20:35:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:55,756 INFO L225 Difference]: With dead ends: 1797 [2021-07-13 20:35:55,756 INFO L226 Difference]: Without dead ends: 1782 [2021-07-13 20:35:55,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2773.4ms TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:35:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-07-13 20:35:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1206. [2021-07-13 20:35:55,779 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) [2021-07-13 20:35:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-13 20:35:55,782 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-13 20:35:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:55,782 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-13 20:35:55,782 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) [2021-07-13 20:35:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-13 20:35:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:55,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:55,784 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] [2021-07-13 20:35:55,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-07-13 20:35:55,984 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-07-13 20:35:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:55,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409941187] [2021-07-13 20:35:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:56,334 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-13 20:35:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:56,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:56,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409941187] [2021-07-13 20:35:56,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409941187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:56,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525339936] [2021-07-13 20:35:56,611 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 [2021-07-13 20:35:56,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:56,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:56,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:35:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:57,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,425 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:35:57,425 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 37 treesize of output 51 [2021-07-13 20:35:57,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,491 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:35:57,492 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 37 treesize of output 51 [2021-07-13 20:35:57,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,558 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:35:57,558 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 44 [2021-07-13 20:35:57,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,588 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:35:57,588 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 37 treesize of output 1 [2021-07-13 20:35:57,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,641 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:35:57,641 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 44 [2021-07-13 20:35:57,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,689 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-07-13 20:35:57,689 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 39 treesize of output 42 [2021-07-13 20:35:57,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,713 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:35:57,713 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:35:57,714 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,763 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:35:57,763 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-07-13 20:35:57,777 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,805 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:35:57,805 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 1 [2021-07-13 20:35:57,806 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,861 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:35:57,862 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 44 [2021-07-13 20:35:57,869 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,895 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:35:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-07-13 20:35:57,896 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,952 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:35:57,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 44 [2021-07-13 20:35:57,965 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:57,991 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:35:57,991 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 [2021-07-13 20:35:57,992 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,018 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:35:58,019 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 37 treesize of output 1 [2021-07-13 20:35:58,019 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,080 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:35:58,081 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 49 [2021-07-13 20:35:58,093 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,109 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:35:58,110 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 39 treesize of output 1 [2021-07-13 20:35:58,111 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,422 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 20:35:58,423 INFO L628 ElimStorePlain]: treesize reduction 109, result has 76.9 percent of original size [2021-07-13 20:35:58,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:58,434 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:437 [2021-07-13 20:35:58,707 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-07-13 20:35:58,870 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-07-13 20:35:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:58,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525339936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:58,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:58,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:35:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589712161] [2021-07-13 20:35:58,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:35:58,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:35:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:35:58,903 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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) [2021-07-13 20:36:00,068 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-07-13 20:36:00,621 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-07-13 20:36:00,772 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-07-13 20:36:00,968 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-13 20:36:01,446 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2021-07-13 20:36:01,983 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2021-07-13 20:36:02,369 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2021-07-13 20:36:02,525 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-13 20:36:02,686 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-07-13 20:36:03,093 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2021-07-13 20:36:03,479 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2021-07-13 20:36:03,727 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 46 [2021-07-13 20:36:04,064 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-13 20:36:04,290 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-13 20:36:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:04,537 INFO L93 Difference]: Finished difference Result 2305 states and 7128 transitions. [2021-07-13 20:36:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:36:04,537 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 [2021-07-13 20:36:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:04,541 INFO L225 Difference]: With dead ends: 2305 [2021-07-13 20:36:04,541 INFO L226 Difference]: Without dead ends: 2260 [2021-07-13 20:36:04,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 6054.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2940, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:36:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-07-13 20:36:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1349. [2021-07-13 20:36:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.306379821958457) internal successors, (4457), 1348 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4457 transitions. [2021-07-13 20:36:04,563 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4457 transitions. Word has length 26 [2021-07-13 20:36:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:04,563 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4457 transitions. [2021-07-13 20:36:04,563 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) [2021-07-13 20:36:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4457 transitions. [2021-07-13 20:36:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:04,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:04,565 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] [2021-07-13 20:36:04,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:04,766 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-07-13 20:36:04,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:04,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906940185] [2021-07-13 20:36:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:05,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:05,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906940185] [2021-07-13 20:36:05,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906940185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:05,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754663521] [2021-07-13 20:36:05,300 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 [2021-07-13 20:36:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:36:05,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:05,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,727 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:36:05,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,734 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 33 treesize of output 19 [2021-07-13 20:36:05,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,741 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 [2021-07-13 20:36:05,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,771 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,777 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 28 treesize of output 16 [2021-07-13 20:36:05,778 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,785 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,791 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:36:05,792 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,799 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,805 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 [2021-07-13 20:36:05,807 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,813 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,821 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:05,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:05,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:05,826 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:05,927 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-07-13 20:36:05,927 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:36:05,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:05,930 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:36:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:05,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754663521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:05,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:05,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:05,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212258735] [2021-07-13 20:36:05,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:05,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:05,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:05,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:05,990 INFO L87 Difference]: Start difference. First operand 1349 states and 4457 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) [2021-07-13 20:36:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:07,016 INFO L93 Difference]: Finished difference Result 1744 states and 5646 transitions. [2021-07-13 20:36:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:36:07,017 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 [2021-07-13 20:36:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:07,019 INFO L225 Difference]: With dead ends: 1744 [2021-07-13 20:36:07,019 INFO L226 Difference]: Without dead ends: 1729 [2021-07-13 20:36:07,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1377.8ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:36:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-07-13 20:36:07,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1360. [2021-07-13 20:36:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.3038999264164826) internal successors, (4490), 1359 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4490 transitions. [2021-07-13 20:36:07,039 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4490 transitions. Word has length 26 [2021-07-13 20:36:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:07,039 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4490 transitions. [2021-07-13 20:36:07,039 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) [2021-07-13 20:36:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4490 transitions. [2021-07-13 20:36:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:07,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:07,042 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] [2021-07-13 20:36:07,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-13 20:36:07,256 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-07-13 20:36:07,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:07,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122147023] [2021-07-13 20:36:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:07,486 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-13 20:36:07,623 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-07-13 20:36:07,752 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-07-13 20:36:07,992 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 20:36:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:08,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:08,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122147023] [2021-07-13 20:36:08,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122147023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:08,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449532994] [2021-07-13 20:36:08,042 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 [2021-07-13 20:36:08,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:08,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:08,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:36:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:08,437 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:36:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:08,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:08,588 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-13 20:36:08,588 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 40 treesize of output 22 [2021-07-13 20:36:08,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:08,620 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:08,620 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 33 treesize of output 30 [2021-07-13 20:36:08,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:09,017 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 130 [2021-07-13 20:36:09,018 INFO L628 ElimStorePlain]: treesize reduction 403, result has 46.9 percent of original size [2021-07-13 20:36:09,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,036 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 16 treesize of output 26 [2021-07-13 20:36:09,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:09,171 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:36:09,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:09,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:09,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,194 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 37 treesize of output 37 [2021-07-13 20:36:09,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:09,333 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:36:09,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:09,355 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:09,356 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 30 [2021-07-13 20:36:09,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:09,490 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:36:09,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,508 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:09,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:09,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:09,636 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:36:09,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:09,656 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:36:09,656 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:36:09,657 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:09,782 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:36:09,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:09,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,799 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-07-13 20:36:09,801 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:09,934 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-13 20:36:09,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:09,952 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:09,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:09,956 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:10,078 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-13 20:36:10,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:10,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:10,095 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:825, output treesize:551 [2021-07-13 20:36:10,380 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-13 20:36:10,581 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-13 20:36:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:10,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449532994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:10,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:10,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:36:10,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599445617] [2021-07-13 20:36:10,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:10,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:10,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:10,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:10,695 INFO L87 Difference]: Start difference. First operand 1360 states and 4490 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) [2021-07-13 20:36:11,477 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-07-13 20:36:11,688 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-07-13 20:36:11,874 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-13 20:36:12,074 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-07-13 20:36:12,326 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2021-07-13 20:36:12,654 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2021-07-13 20:36:13,008 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:36:13,491 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-07-13 20:36:13,908 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-13 20:36:14,281 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-07-13 20:36:14,436 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-07-13 20:36:14,710 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-07-13 20:36:15,064 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-07-13 20:36:15,513 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-13 20:36:15,764 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-07-13 20:36:16,289 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2021-07-13 20:36:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:16,386 INFO L93 Difference]: Finished difference Result 2016 states and 6372 transitions. [2021-07-13 20:36:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:36:16,386 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 [2021-07-13 20:36:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:16,390 INFO L225 Difference]: With dead ends: 2016 [2021-07-13 20:36:16,390 INFO L226 Difference]: Without dead ends: 2001 [2021-07-13 20:36:16,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 6334.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:36:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-07-13 20:36:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1371. [2021-07-13 20:36:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3124087591240876) internal successors, (4538), 1370 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4538 transitions. [2021-07-13 20:36:16,410 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4538 transitions. Word has length 26 [2021-07-13 20:36:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:16,411 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4538 transitions. [2021-07-13 20:36:16,411 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) [2021-07-13 20:36:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4538 transitions. [2021-07-13 20:36:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:16,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:16,413 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] [2021-07-13 20:36:16,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-07-13 20:36:16,614 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-07-13 20:36:16,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:16,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802686585] [2021-07-13 20:36:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:16,846 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-07-13 20:36:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:17,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:17,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802686585] [2021-07-13 20:36:17,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802686585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:17,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472666908] [2021-07-13 20:36:17,093 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 [2021-07-13 20:36:17,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:17,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:17,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:17,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,517 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 33 treesize of output 19 [2021-07-13 20:36:17,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:17,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:17,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,540 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 28 treesize of output 16 [2021-07-13 20:36:17,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:17,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,555 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 26 treesize of output 13 [2021-07-13 20:36:17,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:17,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:17,572 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:17,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:17,585 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:17,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:17,599 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,605 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 36 treesize of output 19 [2021-07-13 20:36:17,606 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:17,613 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:17,617 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 26 treesize of output 13 [2021-07-13 20:36:17,618 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:17,718 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-07-13 20:36:17,718 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:36:17,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:17,720 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:36:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:17,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472666908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:17,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:17,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:17,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699648117] [2021-07-13 20:36:17,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:17,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:17,789 INFO L87 Difference]: Start difference. First operand 1371 states and 4538 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) [2021-07-13 20:36:18,526 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-07-13 20:36:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:19,172 INFO L93 Difference]: Finished difference Result 1859 states and 6002 transitions. [2021-07-13 20:36:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:36:19,172 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 [2021-07-13 20:36:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:19,175 INFO L225 Difference]: With dead ends: 1859 [2021-07-13 20:36:19,175 INFO L226 Difference]: Without dead ends: 1844 [2021-07-13 20:36:19,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1679.5ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:36:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-07-13 20:36:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1380. [2021-07-13 20:36:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:36:19,197 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:36:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:19,197 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:36:19,197 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) [2021-07-13 20:36:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:36:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:19,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:19,200 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] [2021-07-13 20:36:19,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:19,401 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:19,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-07-13 20:36:19,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:19,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983223391] [2021-07-13 20:36:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:19,695 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-07-13 20:36:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:19,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:19,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983223391] [2021-07-13 20:36:19,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983223391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:19,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365756430] [2021-07-13 20:36:19,959 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 [2021-07-13 20:36:19,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:19,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:20,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,394 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 21 treesize of output 13 [2021-07-13 20:36:20,395 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,400 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 28 treesize of output 16 [2021-07-13 20:36:20,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,406 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 21 treesize of output 13 [2021-07-13 20:36:20,406 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,412 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,418 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,423 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 31 treesize of output 19 [2021-07-13 20:36:20,424 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,432 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,438 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:20,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:20,443 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,516 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:36:20,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:20,518 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:36:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:20,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365756430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:20,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:20,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:36:20,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542195341] [2021-07-13 20:36:20,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:36:20,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:20,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:36:20,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:36:20,577 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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) [2021-07-13 20:36:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:21,250 INFO L93 Difference]: Finished difference Result 1722 states and 5631 transitions. [2021-07-13 20:36:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:36:21,251 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 [2021-07-13 20:36:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:21,254 INFO L225 Difference]: With dead ends: 1722 [2021-07-13 20:36:21,254 INFO L226 Difference]: Without dead ends: 1707 [2021-07-13 20:36:21,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1124.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:36:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-07-13 20:36:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1380. [2021-07-13 20:36:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:36:21,273 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:36:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:21,273 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:36:21,273 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) [2021-07-13 20:36:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:36:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:21,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:21,276 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] [2021-07-13 20:36:21,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-07-13 20:36:21,477 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-07-13 20:36:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:21,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351891620] [2021-07-13 20:36:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:21,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:21,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351891620] [2021-07-13 20:36:21,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351891620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:21,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105263415] [2021-07-13 20:36:21,909 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 [2021-07-13 20:36:21,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:36:21,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:21,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:21,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,324 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:22,324 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 [2021-07-13 20:36:22,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,337 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:22,337 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 [2021-07-13 20:36:22,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,347 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:22,347 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 33 treesize of output 19 [2021-07-13 20:36:22,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,358 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:22,358 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 [2021-07-13 20:36:22,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,367 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:22,368 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 [2021-07-13 20:36:22,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,380 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 [2021-07-13 20:36:22,381 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,393 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 [2021-07-13 20:36:22,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,409 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 [2021-07-13 20:36:22,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,420 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:22,420 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 [2021-07-13 20:36:22,421 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,432 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 16 treesize of output 18 [2021-07-13 20:36:22,436 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,445 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:22,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:22,446 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,455 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:22,455 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 [2021-07-13 20:36:22,456 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:22,467 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 [2021-07-13 20:36:22,469 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,479 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 [2021-07-13 20:36:22,481 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,489 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:22,489 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 [2021-07-13 20:36:22,490 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:22,496 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:22,496 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 [2021-07-13 20:36:22,496 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:22,585 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-13 20:36:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:22,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105263415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:22,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:22,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:36:22,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626245299] [2021-07-13 20:36:22,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:22,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:22,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:22,786 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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) [2021-07-13 20:36:23,265 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 39 [2021-07-13 20:36:23,471 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-07-13 20:36:23,958 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-07-13 20:36:24,105 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-13 20:36:24,385 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-07-13 20:36:24,688 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-07-13 20:36:25,295 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-13 20:36:25,476 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 20:36:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:25,631 INFO L93 Difference]: Finished difference Result 2174 states and 6962 transitions. [2021-07-13 20:36:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:36:25,631 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 [2021-07-13 20:36:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:25,635 INFO L225 Difference]: With dead ends: 2174 [2021-07-13 20:36:25,635 INFO L226 Difference]: Without dead ends: 2144 [2021-07-13 20:36:25,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2896.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:36:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-07-13 20:36:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1380. [2021-07-13 20:36:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:36:25,661 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:36:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:25,661 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:36:25,661 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) [2021-07-13 20:36:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:36:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:25,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:25,664 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] [2021-07-13 20:36:25,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-13 20:36:25,877 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:25,877 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-07-13 20:36:25,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:25,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901556723] [2021-07-13 20:36:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:26,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:26,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901556723] [2021-07-13 20:36:26,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901556723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:26,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809557778] [2021-07-13 20:36:26,415 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 [2021-07-13 20:36:26,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:36:26,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:26,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:36:26,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:26,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,696 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,696 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 [2021-07-13 20:36:26,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,704 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:26,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,713 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,713 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 [2021-07-13 20:36:26,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,724 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 33 treesize of output 27 [2021-07-13 20:36:26,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,737 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 [2021-07-13 20:36:26,740 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:26,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,761 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:26,762 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,775 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 28 treesize of output 24 [2021-07-13 20:36:26,781 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,796 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 [2021-07-13 20:36:26,798 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,810 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,810 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 [2021-07-13 20:36:26,811 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,823 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,823 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 [2021-07-13 20:36:26,824 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,835 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 16 [2021-07-13 20:36:26,836 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,849 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:26,849 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 [2021-07-13 20:36:26,851 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:26,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:26,864 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,879 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:26,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:26,881 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:26,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:26,890 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 [2021-07-13 20:36:26,891 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:26,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:26,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:26,991 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:36:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:27,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809557778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:27,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:27,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:36:27,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104709486] [2021-07-13 20:36:27,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:27,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:27,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:27,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:27,187 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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) [2021-07-13 20:36:27,647 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-07-13 20:36:28,043 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-13 20:36:28,389 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-13 20:36:28,869 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-07-13 20:36:29,248 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-07-13 20:36:29,401 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-13 20:36:29,682 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:36:30,041 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-07-13 20:36:30,327 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-07-13 20:36:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:30,383 INFO L93 Difference]: Finished difference Result 1982 states and 6430 transitions. [2021-07-13 20:36:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:36:30,383 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 [2021-07-13 20:36:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:30,387 INFO L225 Difference]: With dead ends: 1982 [2021-07-13 20:36:30,387 INFO L226 Difference]: Without dead ends: 1967 [2021-07-13 20:36:30,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 3431.1ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:36:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-13 20:36:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1380. [2021-07-13 20:36:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-13 20:36:30,410 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-13 20:36:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:30,410 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-13 20:36:30,410 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) [2021-07-13 20:36:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-13 20:36:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:30,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:30,412 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] [2021-07-13 20:36:30,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-07-13 20:36:30,613 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-07-13 20:36:30,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:30,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618181069] [2021-07-13 20:36:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:31,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:31,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618181069] [2021-07-13 20:36:31,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618181069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:31,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593275057] [2021-07-13 20:36:31,151 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 [2021-07-13 20:36:31,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:31,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:31,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:31,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:31,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,782 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 [2021-07-13 20:36:31,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,790 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:36:31,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,799 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 41 treesize of output 16 [2021-07-13 20:36:31,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,807 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 [2021-07-13 20:36:31,808 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,831 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 [2021-07-13 20:36:31,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:31,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,848 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:31,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,856 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:36:31,857 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:31,865 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,874 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 [2021-07-13 20:36:31,875 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,882 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 [2021-07-13 20:36:31,883 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,890 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 [2021-07-13 20:36:31,891 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,898 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 [2021-07-13 20:36:31,899 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:31,906 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:31,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:31,910 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 [2021-07-13 20:36:31,910 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:31,934 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:36:31,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:31,936 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:36:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:31,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593275057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:31,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:31,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:36:31,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160363423] [2021-07-13 20:36:31,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:31,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:31,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:31,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:31,972 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 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) [2021-07-13 20:36:32,389 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-07-13 20:36:32,890 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-07-13 20:36:33,440 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-07-13 20:36:33,741 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-07-13 20:36:33,932 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-07-13 20:36:34,386 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-07-13 20:36:34,935 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-07-13 20:36:35,581 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-07-13 20:36:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:36,288 INFO L93 Difference]: Finished difference Result 3227 states and 9972 transitions. [2021-07-13 20:36:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:36:36,289 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 [2021-07-13 20:36:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:36,294 INFO L225 Difference]: With dead ends: 3227 [2021-07-13 20:36:36,294 INFO L226 Difference]: Without dead ends: 3182 [2021-07-13 20:36:36,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 4199.9ms TimeCoverageRelationStatistics Valid=669, Invalid=3363, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:36:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-07-13 20:36:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1395. [2021-07-13 20:36:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.33142037302726) internal successors, (4644), 1394 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4644 transitions. [2021-07-13 20:36:36,320 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4644 transitions. Word has length 26 [2021-07-13 20:36:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:36,320 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 4644 transitions. [2021-07-13 20:36:36,320 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) [2021-07-13 20:36:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4644 transitions. [2021-07-13 20:36:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:36,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:36,322 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] [2021-07-13 20:36:36,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-07-13 20:36:36,523 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-07-13 20:36:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:36,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36722070] [2021-07-13 20:36:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:37,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:37,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36722070] [2021-07-13 20:36:37,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36722070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:37,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214598124] [2021-07-13 20:36:37,042 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 [2021-07-13 20:36:37,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:37,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:37,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:36:37,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:37,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:37,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,658 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 [2021-07-13 20:36:37,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,665 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 [2021-07-13 20:36:37,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,683 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 [2021-07-13 20:36:37,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,690 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 [2021-07-13 20:36:37,693 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:37,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:37,708 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,714 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 39 treesize of output 19 [2021-07-13 20:36:37,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:37,723 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:37,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,743 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 [2021-07-13 20:36:37,744 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,752 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 39 treesize of output 13 [2021-07-13 20:36:37,753 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,761 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 [2021-07-13 20:36:37,762 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,768 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 [2021-07-13 20:36:37,769 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:37,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:37,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:37,774 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:37,799 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:36:37,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:37,800 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:36:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214598124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:37,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:37,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:36:37,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019053582] [2021-07-13 20:36:37,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:37,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:37,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:37,838 INFO L87 Difference]: Start difference. First operand 1395 states and 4644 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) [2021-07-13 20:36:38,344 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-13 20:36:38,757 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-07-13 20:36:38,917 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-07-13 20:36:39,207 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-07-13 20:36:39,542 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-07-13 20:36:39,990 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-07-13 20:36:40,409 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-07-13 20:36:41,264 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-07-13 20:36:41,448 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-07-13 20:36:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:41,701 INFO L93 Difference]: Finished difference Result 3009 states and 9476 transitions. [2021-07-13 20:36:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:36:41,702 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 [2021-07-13 20:36:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:41,707 INFO L225 Difference]: With dead ends: 3009 [2021-07-13 20:36:41,707 INFO L226 Difference]: Without dead ends: 2964 [2021-07-13 20:36:41,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3877.5ms TimeCoverageRelationStatistics Valid=601, Invalid=2705, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:36:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-07-13 20:36:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1398. [2021-07-13 20:36:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3335719398711525) internal successors, (4657), 1397 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4657 transitions. [2021-07-13 20:36:41,734 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4657 transitions. Word has length 26 [2021-07-13 20:36:41,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:41,734 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4657 transitions. [2021-07-13 20:36:41,734 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) [2021-07-13 20:36:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4657 transitions. [2021-07-13 20:36:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:41,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:41,736 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] [2021-07-13 20:36:41,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-13 20:36:41,937 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-07-13 20:36:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:41,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546970074] [2021-07-13 20:36:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:42,333 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-13 20:36:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:42,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546970074] [2021-07-13 20:36:42,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546970074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983278817] [2021-07-13 20:36:42,469 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 [2021-07-13 20:36:42,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:36:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:36:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:43,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,022 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:36:43,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:43,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,054 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:36:43,054 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 [2021-07-13 20:36:43,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,084 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-13 20:36:43,085 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 25 [2021-07-13 20:36:43,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:43,111 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 [2021-07-13 20:36:43,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,150 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-13 20:36:43,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-07-13 20:36:43,152 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,169 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,170 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 41 treesize of output 1 [2021-07-13 20:36:43,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,188 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,188 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 [2021-07-13 20:36:43,189 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,214 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-13 20:36:43,214 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 [2021-07-13 20:36:43,216 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,234 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,234 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 [2021-07-13 20:36:43,234 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,252 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,252 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 [2021-07-13 20:36:43,253 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,280 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-13 20:36:43,280 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 [2021-07-13 20:36:43,286 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,309 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:43,311 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,335 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,335 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 [2021-07-13 20:36:43,336 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,359 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,359 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 45 treesize of output 1 [2021-07-13 20:36:43,360 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,380 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,380 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 [2021-07-13 20:36:43,381 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:43,391 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:36:43,391 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 [2021-07-13 20:36:43,391 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:43,499 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-07-13 20:36:43,499 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.3 percent of original size [2021-07-13 20:36:43,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:43,501 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-13 20:36:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:43,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983278817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:43,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:43,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:36:43,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018388719] [2021-07-13 20:36:43,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:43,642 INFO L87 Difference]: Start difference. First operand 1398 states and 4657 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) [2021-07-13 20:36:44,060 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-13 20:36:44,231 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-07-13 20:36:44,361 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-07-13 20:36:44,706 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-07-13 20:36:44,874 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-13 20:36:45,458 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-07-13 20:36:45,956 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-13 20:36:46,271 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-07-13 20:36:46,467 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2021-07-13 20:36:46,798 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-07-13 20:36:47,046 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-07-13 20:36:47,182 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2021-07-13 20:36:47,452 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-07-13 20:36:47,667 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2021-07-13 20:36:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:48,318 INFO L93 Difference]: Finished difference Result 3194 states and 9881 transitions. [2021-07-13 20:36:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:36:48,319 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 [2021-07-13 20:36:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:48,324 INFO L225 Difference]: With dead ends: 3194 [2021-07-13 20:36:48,324 INFO L226 Difference]: Without dead ends: 3134 [2021-07-13 20:36:48,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4660.5ms TimeCoverageRelationStatistics Valid=743, Invalid=3039, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:36:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2021-07-13 20:36:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 1411. [2021-07-13 20:36:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 3.3453900709219857) internal successors, (4717), 1410 states have internal predecessors, (4717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 4717 transitions. [2021-07-13 20:36:48,352 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 4717 transitions. Word has length 26 [2021-07-13 20:36:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:48,352 INFO L482 AbstractCegarLoop]: Abstraction has 1411 states and 4717 transitions. [2021-07-13 20:36:48,352 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) [2021-07-13 20:36:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 4717 transitions. [2021-07-13 20:36:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:48,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:48,354 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] [2021-07-13 20:36:48,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-07-13 20:36:48,555 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:48,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-07-13 20:36:48,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:48,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893123586] [2021-07-13 20:36:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:48,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:48,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893123586] [2021-07-13 20:36:48,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893123586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:48,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759600960] [2021-07-13 20:36:48,900 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 [2021-07-13 20:36:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,318 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 26 treesize of output 13 [2021-07-13 20:36:49,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:49,341 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,382 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 [2021-07-13 20:36:49,388 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:49,396 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,403 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,411 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,418 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,425 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:49,432 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:49,439 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:49,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:49,443 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 33 treesize of output 19 [2021-07-13 20:36:49,444 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:49,553 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-07-13 20:36:49,553 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:36:49,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:49,555 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:36:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:49,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759600960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:49,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:49,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:36:49,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943593849] [2021-07-13 20:36:49,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:49,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:49,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:49,627 INFO L87 Difference]: Start difference. First operand 1411 states and 4717 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) [2021-07-13 20:36:50,620 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-07-13 20:36:50,849 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-13 20:36:51,274 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 57 [2021-07-13 20:36:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:51,564 INFO L93 Difference]: Finished difference Result 1958 states and 6368 transitions. [2021-07-13 20:36:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:36:51,565 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 [2021-07-13 20:36:51,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:51,568 INFO L225 Difference]: With dead ends: 1958 [2021-07-13 20:36:51,568 INFO L226 Difference]: Without dead ends: 1943 [2021-07-13 20:36:51,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1869.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:36:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-07-13 20:36:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1455. [2021-07-13 20:36:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.343878954607978) internal successors, (4862), 1454 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4862 transitions. [2021-07-13 20:36:51,589 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4862 transitions. Word has length 26 [2021-07-13 20:36:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:51,589 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4862 transitions. [2021-07-13 20:36:51,589 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) [2021-07-13 20:36:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4862 transitions. [2021-07-13 20:36:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:51,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:51,591 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] [2021-07-13 20:36:51,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-07-13 20:36:51,792 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-07-13 20:36:51,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:51,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627189990] [2021-07-13 20:36:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:52,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:52,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627189990] [2021-07-13 20:36:52,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627189990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:52,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480043543] [2021-07-13 20:36:52,220 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 [2021-07-13 20:36:52,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:52,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:52,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:36:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:52,579 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:36:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:52,655 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:52,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:52,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:52,808 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-07-13 20:36:52,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:52,831 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:36:52,831 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-07-13 20:36:52,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:52,968 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-13 20:36:52,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:52,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:52,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:36:52,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,125 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:36:53,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,147 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:36:53,147 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 38 treesize of output 30 [2021-07-13 20:36:53,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,276 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:36:53,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,298 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:53,298 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-07-13 20:36:53,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,424 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:36:53,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,443 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 45 treesize of output 41 [2021-07-13 20:36:53,446 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,574 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:36:53,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,596 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:36:53,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:36:53,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,724 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:36:53,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:53,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,741 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-07-13 20:36:53,742 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:53,870 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-13 20:36:53,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:53,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:53,894 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-07-13 20:36:54,171 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-13 20:36:54,364 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-07-13 20:36:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:54,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480043543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:54,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:54,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:36:54,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087984670] [2021-07-13 20:36:54,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:54,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:54,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:54,470 INFO L87 Difference]: Start difference. First operand 1455 states and 4862 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) [2021-07-13 20:36:55,343 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 36 [2021-07-13 20:36:55,830 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 44 [2021-07-13 20:36:56,347 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:36:56,789 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-13 20:36:57,006 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-13 20:36:57,280 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-07-13 20:36:57,628 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-07-13 20:36:57,996 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-07-13 20:36:58,249 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-07-13 20:36:58,716 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2021-07-13 20:36:58,944 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-07-13 20:36:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:59,033 INFO L93 Difference]: Finished difference Result 2081 states and 6658 transitions. [2021-07-13 20:36:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:36:59,034 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 [2021-07-13 20:36:59,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:59,037 INFO L225 Difference]: With dead ends: 2081 [2021-07-13 20:36:59,037 INFO L226 Difference]: Without dead ends: 2051 [2021-07-13 20:36:59,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4905.0ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:36:59,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-07-13 20:36:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1451. [2021-07-13 20:36:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 3.3393103448275863) internal successors, (4842), 1450 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4842 transitions. [2021-07-13 20:36:59,060 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4842 transitions. Word has length 26 [2021-07-13 20:36:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:59,060 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4842 transitions. [2021-07-13 20:36:59,060 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) [2021-07-13 20:36:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4842 transitions. [2021-07-13 20:36:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:59,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:59,064 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] [2021-07-13 20:36:59,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:59,283 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:59,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:59,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1764992822, now seen corresponding path program 15 times [2021-07-13 20:36:59,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:59,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946130316] [2021-07-13 20:36:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:59,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946130316] [2021-07-13 20:36:59,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946130316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092331819] [2021-07-13 20:36:59,652 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 [2021-07-13 20:36:59,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:36:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:00,036 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:00,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,072 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,111 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:00,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,112 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,124 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,125 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:00,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,148 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,160 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:00,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,161 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,172 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:00,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:00,173 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,194 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:00,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,196 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:00,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:00,221 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,231 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:00,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,232 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,251 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:00,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,255 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,272 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:00,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:00,273 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,282 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:00,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,283 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,300 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:00,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:00,302 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,308 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:00,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:00,309 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,419 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-07-13 20:37:00,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:00,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:00,442 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:376 [2021-07-13 20:37:00,749 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-13 20:37:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:00,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092331819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:00,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:00,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:37:00,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339992067] [2021-07-13 20:37:00,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:00,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:00,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:00,867 INFO L87 Difference]: Start difference. First operand 1451 states and 4842 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) [2021-07-13 20:37:01,467 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-07-13 20:37:01,963 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-07-13 20:37:02,248 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-07-13 20:37:02,563 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2021-07-13 20:37:03,547 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-07-13 20:37:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:03,620 INFO L93 Difference]: Finished difference Result 2000 states and 6458 transitions. [2021-07-13 20:37:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:37:03,621 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 [2021-07-13 20:37:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:03,625 INFO L225 Difference]: With dead ends: 2000 [2021-07-13 20:37:03,625 INFO L226 Difference]: Without dead ends: 1985 [2021-07-13 20:37:03,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2921.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:37:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-07-13 20:37:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1452. [2021-07-13 20:37:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.3418332184700206) internal successors, (4849), 1451 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4849 transitions. [2021-07-13 20:37:03,655 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4849 transitions. Word has length 26 [2021-07-13 20:37:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:03,655 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 4849 transitions. [2021-07-13 20:37:03,655 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) [2021-07-13 20:37:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4849 transitions. [2021-07-13 20:37:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:03,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:03,658 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] [2021-07-13 20:37:03,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:03,881 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 16 times [2021-07-13 20:37:03,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:03,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941623620] [2021-07-13 20:37:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:04,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:04,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941623620] [2021-07-13 20:37:04,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941623620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:04,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659980445] [2021-07-13 20:37:04,345 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 [2021-07-13 20:37:04,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:04,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:04,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:04,671 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 [2021-07-13 20:37:04,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,683 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:04,683 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 [2021-07-13 20:37:04,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:04,696 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 [2021-07-13 20:37:04,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:04,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,728 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:04,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,742 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:04,756 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:37:04,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,770 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:04,770 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 [2021-07-13 20:37:04,771 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:04,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,787 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,802 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:04,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,816 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:04,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,817 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,833 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:04,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,834 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,848 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:04,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,849 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:04,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:04,871 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:04,887 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 [2021-07-13 20:37:04,888 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:04,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:04,897 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:04,897 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 [2021-07-13 20:37:04,898 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:04,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:04,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:04,975 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-13 20:37:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659980445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:05,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:05,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:37:05,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240339146] [2021-07-13 20:37:05,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:05,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:05,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:05,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:05,191 INFO L87 Difference]: Start difference. First operand 1452 states and 4849 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) [2021-07-13 20:37:05,961 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-07-13 20:37:06,329 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-07-13 20:37:06,527 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2021-07-13 20:37:06,696 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-13 20:37:06,897 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-07-13 20:37:07,104 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-07-13 20:37:07,348 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-07-13 20:37:07,584 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 20:37:07,942 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-13 20:37:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:08,148 INFO L93 Difference]: Finished difference Result 2355 states and 7541 transitions. [2021-07-13 20:37:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:37:08,153 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 [2021-07-13 20:37:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:08,157 INFO L225 Difference]: With dead ends: 2355 [2021-07-13 20:37:08,157 INFO L226 Difference]: Without dead ends: 2325 [2021-07-13 20:37:08,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 3219.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:37:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-07-13 20:37:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1465. [2021-07-13 20:37:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-07-13 20:37:08,184 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-07-13 20:37:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:08,184 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-07-13 20:37:08,184 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) [2021-07-13 20:37:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-07-13 20:37:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:08,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:08,187 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] [2021-07-13 20:37:08,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:08,387 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-07-13 20:37:08,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:08,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943209675] [2021-07-13 20:37:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:08,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:08,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943209675] [2021-07-13 20:37:08,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943209675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:08,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159503020] [2021-07-13 20:37:08,763 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 [2021-07-13 20:37:08,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:08,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:09,142 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-13 20:37:09,323 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-07-13 20:37:09,401 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_46], 2=[A, v_prenex_45]} [2021-07-13 20:37:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,405 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 [2021-07-13 20:37:09,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:09,513 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-13 20:37:09,513 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:37:09,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:09,517 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 [2021-07-13 20:37:09,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:09,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:09,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:09,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:09,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:09,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:09,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:09,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:09,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:37:09,612 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:37:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:09,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159503020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:09,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:09,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:37:09,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162317533] [2021-07-13 20:37:09,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:09,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:09,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:09,669 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 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) [2021-07-13 20:37:10,715 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-13 20:37:11,051 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:37:11,411 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-07-13 20:37:11,616 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-07-13 20:37:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:11,799 INFO L93 Difference]: Finished difference Result 2028 states and 6589 transitions. [2021-07-13 20:37:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:37:11,799 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 [2021-07-13 20:37:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:11,802 INFO L225 Difference]: With dead ends: 2028 [2021-07-13 20:37:11,802 INFO L226 Difference]: Without dead ends: 1998 [2021-07-13 20:37:11,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2465.5ms TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:37:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-07-13 20:37:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1468. [2021-07-13 20:37:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3503749147920927) internal successors, (4915), 1467 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4915 transitions. [2021-07-13 20:37:11,826 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4915 transitions. Word has length 26 [2021-07-13 20:37:11,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:11,826 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4915 transitions. [2021-07-13 20:37:11,826 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) [2021-07-13 20:37:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4915 transitions. [2021-07-13 20:37:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:11,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:11,828 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] [2021-07-13 20:37:12,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-07-13 20:37:12,029 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:12,029 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-07-13 20:37:12,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:12,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781198829] [2021-07-13 20:37:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:12,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:12,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781198829] [2021-07-13 20:37:12,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781198829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:12,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316692146] [2021-07-13 20:37:12,416 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 [2021-07-13 20:37:12,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:37:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:12,757 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:37:12,909 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_54, v_prenex_64, v_prenex_58], 6=[A, v_prenex_60, v_prenex_62, v_prenex_56, v_prenex_66]} [2021-07-13 20:37:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:12,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:12,924 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 [2021-07-13 20:37:12,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,265 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2021-07-13 20:37:13,265 INFO L628 ElimStorePlain]: treesize reduction 272, result has 55.1 percent of original size [2021-07-13 20:37:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,279 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 26 treesize of output 24 [2021-07-13 20:37:13,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,407 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:37:13,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,420 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 [2021-07-13 20:37:13,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,538 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:37:13,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,552 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:37:13,552 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 25 treesize of output 19 [2021-07-13 20:37:13,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,666 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:37:13,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,679 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 18 treesize of output 20 [2021-07-13 20:37:13,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,808 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:37:13,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,820 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:37:13,820 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 32 treesize of output 22 [2021-07-13 20:37:13,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:13,924 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-07-13 20:37:13,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:13,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:13,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 26 [2021-07-13 20:37:13,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:14,057 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:37:14,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:14,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:14,068 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:37:14,068 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 [2021-07-13 20:37:14,070 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:14,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:14,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:14,170 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:621, output treesize:217 [2021-07-13 20:37:14,341 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:37:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:14,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316692146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:14,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:14,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:37:14,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339062972] [2021-07-13 20:37:14,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:37:14,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:37:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:14,436 INFO L87 Difference]: Start difference. First operand 1468 states and 4915 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) [2021-07-13 20:37:15,080 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-07-13 20:37:15,644 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:37:16,146 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-13 20:37:16,510 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:37:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:16,733 INFO L93 Difference]: Finished difference Result 1972 states and 6440 transitions. [2021-07-13 20:37:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:37:16,733 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 [2021-07-13 20:37:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:16,736 INFO L225 Difference]: With dead ends: 1972 [2021-07-13 20:37:16,736 INFO L226 Difference]: Without dead ends: 1957 [2021-07-13 20:37:16,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2744.0ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:37:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-07-13 20:37:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1465. [2021-07-13 20:37:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-07-13 20:37:16,765 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-07-13 20:37:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:16,765 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-07-13 20:37:16,765 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) [2021-07-13 20:37:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-07-13 20:37:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:16,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:16,768 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] [2021-07-13 20:37:16,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:16,990 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-07-13 20:37:16,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:16,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631563693] [2021-07-13 20:37:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:17,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631563693] [2021-07-13 20:37:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631563693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136486342] [2021-07-13 20:37:17,491 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 [2021-07-13 20:37:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:17,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,878 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:17,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:17,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,891 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 28 treesize of output 16 [2021-07-13 20:37:17,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:17,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,907 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 [2021-07-13 20:37:17,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:17,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,921 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:37:17,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:17,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:17,934 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,939 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:17,940 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,945 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 21 treesize of output 13 [2021-07-13 20:37:17,946 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:17,954 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:17,960 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:17,966 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:17,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:17,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:17,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:17,970 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:18,047 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:37:18,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:37:18,049 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:37:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:18,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136486342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:18,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:18,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:37:18,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556893461] [2021-07-13 20:37:18,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:37:18,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:18,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:37:18,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:18,103 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 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) [2021-07-13 20:37:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:19,089 INFO L93 Difference]: Finished difference Result 1916 states and 6261 transitions. [2021-07-13 20:37:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:37:19,089 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 [2021-07-13 20:37:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:19,093 INFO L225 Difference]: With dead ends: 1916 [2021-07-13 20:37:19,094 INFO L226 Difference]: Without dead ends: 1895 [2021-07-13 20:37:19,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1232.2ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:37:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-07-13 20:37:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1506. [2021-07-13 20:37:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.345514950166113) internal successors, (5035), 1505 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5035 transitions. [2021-07-13 20:37:19,123 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5035 transitions. Word has length 26 [2021-07-13 20:37:19,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:19,123 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5035 transitions. [2021-07-13 20:37:19,123 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) [2021-07-13 20:37:19,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5035 transitions. [2021-07-13 20:37:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:19,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:19,127 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] [2021-07-13 20:37:19,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1167 [2021-07-13 20:37:19,345 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-07-13 20:37:19,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:19,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804761929] [2021-07-13 20:37:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:19,531 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-07-13 20:37:19,650 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-07-13 20:37:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:19,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804761929] [2021-07-13 20:37:19,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804761929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135127045] [2021-07-13 20:37:19,908 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 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 [2021-07-13 20:37:19,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:19,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:20,626 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:37:20,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-07-13 20:37:20,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:20,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:20,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:37:20,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:21,119 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-07-13 20:37:21,119 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.3 percent of original size [2021-07-13 20:37:21,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:21,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-07-13 20:37:21,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:21,183 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:37:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:37:21,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:21,327 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:37:21,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:21,365 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:37:21,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:37:21,366 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:21,389 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:37:21,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:37:21,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:21,533 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:37:21,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:21,557 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:37:21,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:37:21,559 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:21,585 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:37:21,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-07-13 20:37:21,587 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:21,725 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:37:21,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:21,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:21,762 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:746 [2021-07-13 20:37:22,224 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-13 20:37:22,515 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-13 20:37:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:22,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135127045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:22,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:22,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:37:22,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91492534] [2021-07-13 20:37:22,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:22,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:22,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:22,637 INFO L87 Difference]: Start difference. First operand 1506 states and 5035 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) [2021-07-13 20:37:22,810 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2021-07-13 20:37:22,973 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 27 [2021-07-13 20:37:23,341 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 47 [2021-07-13 20:37:23,657 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 51 [2021-07-13 20:37:24,036 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2021-07-13 20:37:24,366 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2021-07-13 20:37:24,594 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:37:25,192 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-07-13 20:37:25,328 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-07-13 20:37:25,747 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 53 [2021-07-13 20:37:26,034 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 20:37:26,530 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-07-13 20:37:27,000 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-13 20:37:27,502 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2021-07-13 20:37:27,894 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-13 20:37:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:27,944 INFO L93 Difference]: Finished difference Result 2133 states and 6814 transitions. [2021-07-13 20:37:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:37:27,944 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 [2021-07-13 20:37:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:27,948 INFO L225 Difference]: With dead ends: 2133 [2021-07-13 20:37:27,948 INFO L226 Difference]: Without dead ends: 2108 [2021-07-13 20:37:27,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 6381.0ms TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:37:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-07-13 20:37:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1529. [2021-07-13 20:37:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.352094240837696) internal successors, (5122), 1528 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5122 transitions. [2021-07-13 20:37:27,970 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5122 transitions. Word has length 26 [2021-07-13 20:37:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:27,970 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5122 transitions. [2021-07-13 20:37:27,970 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) [2021-07-13 20:37:27,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5122 transitions. [2021-07-13 20:37:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:27,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:27,973 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] [2021-07-13 20:37:28,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-07-13 20:37:28,175 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:28,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-07-13 20:37:28,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:28,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395532757] [2021-07-13 20:37:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:28,470 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-07-13 20:37:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:28,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395532757] [2021-07-13 20:37:28,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395532757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881761520] [2021-07-13 20:37:28,708 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 [2021-07-13 20:37:28,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:28,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:37:28,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:29,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,063 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,063 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 36 treesize of output 22 [2021-07-13 20:37:29,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,072 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,072 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 [2021-07-13 20:37:29,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:29,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,097 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 28 treesize of output 24 [2021-07-13 20:37:29,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,111 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,111 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 [2021-07-13 20:37:29,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,120 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,120 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 [2021-07-13 20:37:29,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,132 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:29,132 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 [2021-07-13 20:37:29,133 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,142 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,142 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 [2021-07-13 20:37:29,143 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,151 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:29,152 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:29,164 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:29,177 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,192 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,192 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 31 treesize of output 19 [2021-07-13 20:37:29,193 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,204 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:29,204 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 [2021-07-13 20:37:29,205 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,216 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:29,216 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 21 treesize of output 17 [2021-07-13 20:37:29,217 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,226 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:29,227 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:29,245 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:29,334 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-13 20:37:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:29,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881761520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:29,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:29,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:37:29,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54401695] [2021-07-13 20:37:29,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:29,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:29,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:29,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:29,529 INFO L87 Difference]: Start difference. First operand 1529 states and 5122 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) [2021-07-13 20:37:30,590 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-07-13 20:37:30,766 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-07-13 20:37:31,017 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 20:37:31,174 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-07-13 20:37:31,472 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-13 20:37:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:31,528 INFO L93 Difference]: Finished difference Result 2011 states and 6582 transitions. [2021-07-13 20:37:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:37:31,528 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 [2021-07-13 20:37:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:31,532 INFO L225 Difference]: With dead ends: 2011 [2021-07-13 20:37:31,532 INFO L226 Difference]: Without dead ends: 1982 [2021-07-13 20:37:31,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2367.7ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:37:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2021-07-13 20:37:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1532. [2021-07-13 20:37:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3527106466361856) internal successors, (5133), 1531 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5133 transitions. [2021-07-13 20:37:31,556 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5133 transitions. Word has length 26 [2021-07-13 20:37:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:31,556 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5133 transitions. [2021-07-13 20:37:31,556 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) [2021-07-13 20:37:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5133 transitions. [2021-07-13 20:37:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:31,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:31,559 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] [2021-07-13 20:37:31,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-07-13 20:37:31,761 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-07-13 20:37:31,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:31,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423312591] [2021-07-13 20:37:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:32,049 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-07-13 20:37:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423312591] [2021-07-13 20:37:32,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423312591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861025806] [2021-07-13 20:37:32,213 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) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:32,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:32,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:32,534 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-13 20:37:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:32,605 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 21 treesize of output 13 [2021-07-13 20:37:32,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:32,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:32,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,722 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-13 20:37:32,722 INFO L628 ElimStorePlain]: treesize reduction 91, result has 58.6 percent of original size [2021-07-13 20:37:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,725 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 [2021-07-13 20:37:32,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:32,770 INFO L518 ElimStorePlain]: Eliminatee v_prenex_87 vanished before elimination [2021-07-13 20:37:32,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:32,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:32,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:32,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:32,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:32,782 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:32,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:37:32,820 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:272, output treesize:51 [2021-07-13 20:37:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861025806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:32,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:37:32,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616820123] [2021-07-13 20:37:32,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:32,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:32,889 INFO L87 Difference]: Start difference. First operand 1532 states and 5133 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) [2021-07-13 20:37:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:33,150 INFO L93 Difference]: Finished difference Result 1607 states and 5324 transitions. [2021-07-13 20:37:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:37:33,151 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 [2021-07-13 20:37:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:33,153 INFO L225 Difference]: With dead ends: 1607 [2021-07-13 20:37:33,153 INFO L226 Difference]: Without dead ends: 1592 [2021-07-13 20:37:33,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 770.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:33,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-13 20:37:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1538. [2021-07-13 20:37:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3545868575146387) internal successors, (5156), 1537 states have internal predecessors, (5156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5156 transitions. [2021-07-13 20:37:33,172 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5156 transitions. Word has length 26 [2021-07-13 20:37:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:33,173 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 5156 transitions. [2021-07-13 20:37:33,173 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) [2021-07-13 20:37:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5156 transitions. [2021-07-13 20:37:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:33,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:33,175 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] [2021-07-13 20:37:33,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1320,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:33,376 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-07-13 20:37:33,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:33,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322737151] [2021-07-13 20:37:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:33,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:33,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322737151] [2021-07-13 20:37:33,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322737151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:33,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011031284] [2021-07-13 20:37:33,728 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 [2021-07-13 20:37:33,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:33,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:33,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:37:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:34,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,247 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:34,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:34,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,401 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:37:34,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,425 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:34,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:34,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,446 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:34,446 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:37:34,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,590 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:37:34,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:34,611 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,630 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:34,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:34,631 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,908 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-07-13 20:37:34,908 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-07-13 20:37:34,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:34,930 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,946 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:34,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:34,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,191 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-13 20:37:35,191 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-07-13 20:37:35,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:35,225 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-07-13 20:37:35,417 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-13 20:37:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:35,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011031284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:35,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:35,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:37:35,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761447761] [2021-07-13 20:37:35,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:35,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:35,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:35,518 INFO L87 Difference]: Start difference. First operand 1538 states and 5156 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) [2021-07-13 20:37:36,351 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-07-13 20:37:37,009 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-07-13 20:37:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:37,055 INFO L93 Difference]: Finished difference Result 2227 states and 7222 transitions. [2021-07-13 20:37:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:37:37,055 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 [2021-07-13 20:37:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:37,059 INFO L225 Difference]: With dead ends: 2227 [2021-07-13 20:37:37,059 INFO L226 Difference]: Without dead ends: 2177 [2021-07-13 20:37:37,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1950.2ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:37:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-07-13 20:37:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1545. [2021-07-13 20:37:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3588082901554404) internal successors, (5186), 1544 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5186 transitions. [2021-07-13 20:37:37,080 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5186 transitions. Word has length 26 [2021-07-13 20:37:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:37,080 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5186 transitions. [2021-07-13 20:37:37,080 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) [2021-07-13 20:37:37,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5186 transitions. [2021-07-13 20:37:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:37,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:37,082 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] [2021-07-13 20:37:37,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-07-13 20:37:37,283 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-07-13 20:37:37,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:37,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667400925] [2021-07-13 20:37:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:37,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667400925] [2021-07-13 20:37:37,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667400925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900577813] [2021-07-13 20:37:37,782 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 [2021-07-13 20:37:37,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,037 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:38,038 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 [2021-07-13 20:37:38,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,046 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:38,046 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 [2021-07-13 20:37:38,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,055 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:38,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:38,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:38,069 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 33 treesize of output 27 [2021-07-13 20:37:38,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:38,081 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 16 treesize of output 18 [2021-07-13 20:37:38,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:38,095 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 [2021-07-13 20:37:38,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,104 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:38,104 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 [2021-07-13 20:37:38,105 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:38,115 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 [2021-07-13 20:37:38,119 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:38,130 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 [2021-07-13 20:37:38,131 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,139 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:38,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:38,140 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:38,149 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 [2021-07-13 20:37:38,150 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,158 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:38,158 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 [2021-07-13 20:37:38,159 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,170 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:38,170 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 [2021-07-13 20:37:38,171 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,181 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:38,181 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 [2021-07-13 20:37:38,182 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,193 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:38,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:38,194 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:38,199 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:38,199 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 31 treesize of output 19 [2021-07-13 20:37:38,200 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:38,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:38,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:38,273 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:37:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:38,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900577813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:38,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:38,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:37:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277099054] [2021-07-13 20:37:38,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:38,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:38,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:38,479 INFO L87 Difference]: Start difference. First operand 1545 states and 5186 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) [2021-07-13 20:37:39,177 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-07-13 20:37:39,786 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-07-13 20:37:40,067 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-13 20:37:40,309 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-13 20:37:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:40,381 INFO L93 Difference]: Finished difference Result 2071 states and 6812 transitions. [2021-07-13 20:37:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:37:40,381 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 [2021-07-13 20:37:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:40,385 INFO L225 Difference]: With dead ends: 2071 [2021-07-13 20:37:40,385 INFO L226 Difference]: Without dead ends: 2052 [2021-07-13 20:37:40,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2219.7ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:37:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-07-13 20:37:40,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1557. [2021-07-13 20:37:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3618251928020566) internal successors, (5231), 1556 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5231 transitions. [2021-07-13 20:37:40,407 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5231 transitions. Word has length 26 [2021-07-13 20:37:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:40,408 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 5231 transitions. [2021-07-13 20:37:40,408 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) [2021-07-13 20:37:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5231 transitions. [2021-07-13 20:37:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:40,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:40,410 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] [2021-07-13 20:37:40,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-07-13 20:37:40,611 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-07-13 20:37:40,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:40,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45642710] [2021-07-13 20:37:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:40,978 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:37:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:41,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:41,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45642710] [2021-07-13 20:37:41,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45642710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:41,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340142048] [2021-07-13 20:37:41,087 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 [2021-07-13 20:37:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:37:41,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:41,482 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-13 20:37:41,597 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_98], 3=[A, v_prenex_100], 6=[v_prenex_99]} [2021-07-13 20:37:41,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:41,614 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 [2021-07-13 20:37:41,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:41,630 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 [2021-07-13 20:37:41,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,820 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:37:41,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,840 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:37:41,840 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 [2021-07-13 20:37:41,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:41,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:41,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,999 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:37:42,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,013 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:37:42,013 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 [2021-07-13 20:37:42,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:42,028 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,149 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:37:42,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:42,165 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:37:42,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-13 20:37:42,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:42,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,183 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 26 [2021-07-13 20:37:42,212 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:42,346 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:37:42,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:42,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:42,356 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:375, output treesize:228 [2021-07-13 20:37:42,561 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 20:37:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:42,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340142048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:42,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:42,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:37:42,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064763632] [2021-07-13 20:37:42,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:37:42,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:37:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:42,661 INFO L87 Difference]: Start difference. First operand 1557 states and 5231 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) [2021-07-13 20:37:42,798 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 28 [2021-07-13 20:37:43,202 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-07-13 20:37:43,493 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-13 20:37:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:43,967 INFO L93 Difference]: Finished difference Result 2052 states and 6751 transitions. [2021-07-13 20:37:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:37:43,967 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 [2021-07-13 20:37:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:43,970 INFO L225 Difference]: With dead ends: 2052 [2021-07-13 20:37:43,970 INFO L226 Difference]: Without dead ends: 2027 [2021-07-13 20:37:43,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1925.4ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:37:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-07-13 20:37:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1563. [2021-07-13 20:37:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.360435339308579) internal successors, (5249), 1562 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5249 transitions. [2021-07-13 20:37:43,991 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5249 transitions. Word has length 26 [2021-07-13 20:37:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:43,991 INFO L482 AbstractCegarLoop]: Abstraction has 1563 states and 5249 transitions. [2021-07-13 20:37:43,991 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) [2021-07-13 20:37:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5249 transitions. [2021-07-13 20:37:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:43,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:43,994 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] [2021-07-13 20:37:44,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1404 [2021-07-13 20:37:44,194 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-07-13 20:37:44,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:44,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929745064] [2021-07-13 20:37:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:44,487 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-07-13 20:37:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:44,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:44,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929745064] [2021-07-13 20:37:44,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929745064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366120173] [2021-07-13 20:37:44,755 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 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 [2021-07-13 20:37:44,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:44,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:44,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:37:44,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:45,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,071 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 [2021-07-13 20:37:45,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,081 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 [2021-07-13 20:37:45,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,091 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 [2021-07-13 20:37:45,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,101 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 [2021-07-13 20:37:45,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,111 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 [2021-07-13 20:37:45,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:45,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,132 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 [2021-07-13 20:37:45,133 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:45,142 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:45,151 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,158 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 [2021-07-13 20:37:45,158 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,166 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 [2021-07-13 20:37:45,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:45,175 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,183 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 [2021-07-13 20:37:45,184 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,191 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 [2021-07-13 20:37:45,193 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,199 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 [2021-07-13 20:37:45,200 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:45,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:45,205 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,242 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.0 percent of original size [2021-07-13 20:37:45,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:45,242 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:809, output treesize:39 [2021-07-13 20:37:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:45,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366120173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:45,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:45,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:37:45,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935024198] [2021-07-13 20:37:45,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:45,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:45,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:45,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:45,306 INFO L87 Difference]: Start difference. First operand 1563 states and 5249 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) [2021-07-13 20:37:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:46,355 INFO L93 Difference]: Finished difference Result 2040 states and 6673 transitions. [2021-07-13 20:37:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:37:46,355 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 [2021-07-13 20:37:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:46,359 INFO L225 Difference]: With dead ends: 2040 [2021-07-13 20:37:46,359 INFO L226 Difference]: Without dead ends: 2014 [2021-07-13 20:37:46,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1440.0ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:37:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-07-13 20:37:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1579. [2021-07-13 20:37:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-07-13 20:37:46,390 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-07-13 20:37:46,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:46,390 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-07-13 20:37:46,390 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) [2021-07-13 20:37:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-07-13 20:37:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:46,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:46,392 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] [2021-07-13 20:37:46,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:46,593 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:46,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:46,593 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-07-13 20:37:46,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:46,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422013095] [2021-07-13 20:37:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:47,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:47,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422013095] [2021-07-13 20:37:47,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422013095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:47,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503525934] [2021-07-13 20:37:47,060 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 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 [2021-07-13 20:37:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:47,417 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_103], 5=[v_prenex_101, v_prenex_105]} [2021-07-13 20:37:47,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:47,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:47,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:47,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:47,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-07-13 20:37:47,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,513 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-07-13 20:37:47,513 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-07-13 20:37:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:47,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:47,517 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 [2021-07-13 20:37:47,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:47,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:47,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:37:47,577 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:33 [2021-07-13 20:37:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:47,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503525934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:47,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:47,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:37:47,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862475187] [2021-07-13 20:37:47,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:37:47,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:47,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:37:47,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:37:47,624 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 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) [2021-07-13 20:37:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:50,245 INFO L93 Difference]: Finished difference Result 2239 states and 7310 transitions. [2021-07-13 20:37:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:37:50,246 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 [2021-07-13 20:37:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:50,250 INFO L225 Difference]: With dead ends: 2239 [2021-07-13 20:37:50,250 INFO L226 Difference]: Without dead ends: 2224 [2021-07-13 20:37:50,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2778.9ms TimeCoverageRelationStatistics Valid=512, Invalid=2244, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:37:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-07-13 20:37:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1579. [2021-07-13 20:37:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-07-13 20:37:50,275 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-07-13 20:37:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:50,276 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-07-13 20:37:50,276 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) [2021-07-13 20:37:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-07-13 20:37:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:50,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:50,278 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] [2021-07-13 20:37:50,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1456 [2021-07-13 20:37:50,479 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:50,479 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-07-13 20:37:50,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:50,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880150651] [2021-07-13 20:37:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:50,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:50,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880150651] [2021-07-13 20:37:50,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880150651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:50,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310953277] [2021-07-13 20:37:50,908 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 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 [2021-07-13 20:37:50,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:50,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:50,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:50,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:51,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:51,159 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 [2021-07-13 20:37:51,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:51,168 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 31 treesize of output 19 [2021-07-13 20:37:51,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,176 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:51,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:51,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,187 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 [2021-07-13 20:37:51,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,199 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 16 treesize of output 18 [2021-07-13 20:37:51,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:51,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:51,223 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 [2021-07-13 20:37:51,223 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,234 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 [2021-07-13 20:37:51,238 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,248 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 [2021-07-13 20:37:51,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:51,258 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 [2021-07-13 20:37:51,258 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,267 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:51,267 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 19 [2021-07-13 20:37:51,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:51,275 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 [2021-07-13 20:37:51,276 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,287 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:51,287 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 [2021-07-13 20:37:51,289 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,299 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:51,299 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 [2021-07-13 20:37:51,301 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,324 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:51,325 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 [2021-07-13 20:37:51,326 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,333 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:51,333 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 [2021-07-13 20:37:51,334 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:51,408 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:37:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:51,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310953277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:51,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:51,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:37:51,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752952172] [2021-07-13 20:37:51,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:51,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:51,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:51,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:51,623 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 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) [2021-07-13 20:37:52,770 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-13 20:37:53,195 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-07-13 20:37:53,375 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-07-13 20:37:53,685 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-13 20:37:53,924 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:37:54,181 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-13 20:37:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:54,226 INFO L93 Difference]: Finished difference Result 2206 states and 7151 transitions. [2021-07-13 20:37:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:37:54,226 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 [2021-07-13 20:37:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:54,230 INFO L225 Difference]: With dead ends: 2206 [2021-07-13 20:37:54,230 INFO L226 Difference]: Without dead ends: 2187 [2021-07-13 20:37:54,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2795.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:37:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-07-13 20:37:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1585. [2021-07-13 20:37:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-07-13 20:37:54,253 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-07-13 20:37:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:54,253 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-07-13 20:37:54,253 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) [2021-07-13 20:37:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-07-13 20:37:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:54,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:54,256 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] [2021-07-13 20:37:54,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:54,456 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-07-13 20:37:54,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:54,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021659943] [2021-07-13 20:37:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:55,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:55,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021659943] [2021-07-13 20:37:55,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021659943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:55,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211113311] [2021-07-13 20:37:55,010 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 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 [2021-07-13 20:37:55,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:55,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:55,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:37:55,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:55,406 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-13 20:37:55,770 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_118, A], 5=[v_prenex_120, v_prenex_116]} [2021-07-13 20:37:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:55,794 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:55,794 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:37:55,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:55,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:55,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:55,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:55,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:55,996 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:37:55,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:56,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:56,021 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:56,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:56,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:56,043 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:56,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:56,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,205 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:37:56,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:56,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:56,228 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:56,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 24 [2021-07-13 20:37:56,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:56,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:56,246 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 32 [2021-07-13 20:37:56,251 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,394 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:37:56,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:56,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:56,418 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 28 [2021-07-13 20:37:56,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:56,438 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:56,438 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 28 [2021-07-13 20:37:56,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:56,566 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:37:56,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:56,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:56,578 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:393, output treesize:161 [2021-07-13 20:37:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:56,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211113311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:56,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:56,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:37:56,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693434430] [2021-07-13 20:37:56,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:37:56,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:56,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:37:56,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:37:56,728 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 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) [2021-07-13 20:37:57,414 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-07-13 20:37:59,246 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2021-07-13 20:37:59,737 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-07-13 20:37:59,927 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-07-13 20:38:00,555 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-07-13 20:38:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:00,979 INFO L93 Difference]: Finished difference Result 2573 states and 8159 transitions. [2021-07-13 20:38:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:38:00,980 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 [2021-07-13 20:38:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:00,984 INFO L225 Difference]: With dead ends: 2573 [2021-07-13 20:38:00,984 INFO L226 Difference]: Without dead ends: 2529 [2021-07-13 20:38:00,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4482.3ms TimeCoverageRelationStatistics Valid=671, Invalid=3361, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:38:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-07-13 20:38:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1585. [2021-07-13 20:38:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-07-13 20:38:01,019 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-07-13 20:38:01,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:01,019 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-07-13 20:38:01,019 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) [2021-07-13 20:38:01,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-07-13 20:38:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:01,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:01,022 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] [2021-07-13 20:38:01,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1487 [2021-07-13 20:38:01,222 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:01,223 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-07-13 20:38:01,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:01,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178814055] [2021-07-13 20:38:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:01,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:01,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178814055] [2021-07-13 20:38:01,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178814055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:01,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794781217] [2021-07-13 20:38:01,741 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 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 [2021-07-13 20:38:01,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,403 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:38:02,404 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 33 [2021-07-13 20:38:02,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:02,445 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 41 [2021-07-13 20:38:02,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,489 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:38:02,490 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 30 treesize of output 26 [2021-07-13 20:38:02,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,526 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:38:02,527 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 [2021-07-13 20:38:02,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,556 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,556 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 [2021-07-13 20:38:02,557 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,580 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,580 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 [2021-07-13 20:38:02,581 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,604 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,604 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 [2021-07-13 20:38:02,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,628 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,628 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 [2021-07-13 20:38:02,629 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,663 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:38:02,663 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 [2021-07-13 20:38:02,665 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,691 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:38:02,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:02,693 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,711 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,712 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 [2021-07-13 20:38:02,712 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,731 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:02,732 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,750 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,750 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 [2021-07-13 20:38:02,750 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,777 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:38:02,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-07-13 20:38:02,778 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,795 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,795 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 [2021-07-13 20:38:02,796 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,807 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:02,807 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 [2021-07-13 20:38:02,807 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,935 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-07-13 20:38:02,935 INFO L628 ElimStorePlain]: treesize reduction 79, result has 66.8 percent of original size [2021-07-13 20:38:02,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:02,938 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-07-13 20:38:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:03,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794781217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:03,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:03,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:38:03,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339588282] [2021-07-13 20:38:03,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:38:03,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:38:03,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:38:03,086 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-07-13 20:38:04,267 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-07-13 20:38:04,718 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-13 20:38:04,839 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-07-13 20:38:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:06,158 INFO L93 Difference]: Finished difference Result 3102 states and 9804 transitions. [2021-07-13 20:38:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:38:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 [2021-07-13 20:38:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:06,163 INFO L225 Difference]: With dead ends: 3102 [2021-07-13 20:38:06,163 INFO L226 Difference]: Without dead ends: 3072 [2021-07-13 20:38:06,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 3262.5ms TimeCoverageRelationStatistics Valid=533, Invalid=3007, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:38:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-07-13 20:38:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1645. [2021-07-13 20:38:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3619221411192215) internal successors, (5527), 1644 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5527 transitions. [2021-07-13 20:38:06,192 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5527 transitions. Word has length 26 [2021-07-13 20:38:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:06,192 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5527 transitions. [2021-07-13 20:38:06,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-07-13 20:38:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5527 transitions. [2021-07-13 20:38:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:06,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:06,195 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] [2021-07-13 20:38:06,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1555 [2021-07-13 20:38:06,397 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:06,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-07-13 20:38:06,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:06,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180714619] [2021-07-13 20:38:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:06,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:06,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180714619] [2021-07-13 20:38:06,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180714619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:06,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127054683] [2021-07-13 20:38:06,943 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 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 [2021-07-13 20:38:06,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:06,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:06,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:06,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,567 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 [2021-07-13 20:38:07,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,576 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 [2021-07-13 20:38:07,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,585 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 [2021-07-13 20:38:07,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,602 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 [2021-07-13 20:38:07,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,611 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 [2021-07-13 20:38:07,612 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,620 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 [2021-07-13 20:38:07,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,628 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 [2021-07-13 20:38:07,628 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,636 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 [2021-07-13 20:38:07,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:07,645 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,652 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 [2021-07-13 20:38:07,653 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,660 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 28 treesize of output 13 [2021-07-13 20:38:07,661 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,668 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 13 [2021-07-13 20:38:07,669 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,677 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 [2021-07-13 20:38:07,677 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,684 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 35 treesize of output 19 [2021-07-13 20:38:07,685 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:07,700 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 [2021-07-13 20:38:07,701 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,737 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:38:07,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:07,739 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:38:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:07,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127054683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:07,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:07,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-13 20:38:07,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667153781] [2021-07-13 20:38:07,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:07,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:07,768 INFO L87 Difference]: Start difference. First operand 1645 states and 5527 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-07-13 20:38:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:10,027 INFO L93 Difference]: Finished difference Result 3253 states and 10418 transitions. [2021-07-13 20:38:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:38:10,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-07-13 20:38:10,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:10,033 INFO L225 Difference]: With dead ends: 3253 [2021-07-13 20:38:10,033 INFO L226 Difference]: Without dead ends: 3217 [2021-07-13 20:38:10,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2326.8ms TimeCoverageRelationStatistics Valid=449, Invalid=2001, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:38:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-07-13 20:38:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 1763. [2021-07-13 20:38:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.388195232690125) internal successors, (5970), 1762 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5970 transitions. [2021-07-13 20:38:10,063 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5970 transitions. Word has length 26 [2021-07-13 20:38:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:10,064 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 5970 transitions. [2021-07-13 20:38:10,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-07-13 20:38:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5970 transitions. [2021-07-13 20:38:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:10,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:10,066 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] [2021-07-13 20:38:10,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-07-13 20:38:10,267 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:10,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:10,267 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-07-13 20:38:10,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:10,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824991828] [2021-07-13 20:38:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:10,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:10,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824991828] [2021-07-13 20:38:10,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824991828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:10,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707384341] [2021-07-13 20:38:10,756 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 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 [2021-07-13 20:38:10,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:10,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:10,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:38:10,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:11,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,282 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:38:11,282 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 31 [2021-07-13 20:38:11,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,308 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:38:11,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:11,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,336 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:11,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:11,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,364 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:38:11,364 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 [2021-07-13 20:38:11,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,382 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:11,382 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 [2021-07-13 20:38:11,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,406 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:38:11,406 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 [2021-07-13 20:38:11,407 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,433 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:38:11,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:11,437 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,461 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:38:11,461 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 [2021-07-13 20:38:11,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:11,486 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 [2021-07-13 20:38:11,492 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,518 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:11,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:11,522 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,539 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:11,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:11,540 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,564 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:38:11,564 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 25 [2021-07-13 20:38:11,566 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,582 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:11,582 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 [2021-07-13 20:38:11,582 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,598 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:11,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:11,598 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,613 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:11,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:11,614 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,623 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:38:11,623 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 41 treesize of output 1 [2021-07-13 20:38:11,624 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,745 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-07-13 20:38:11,746 INFO L628 ElimStorePlain]: treesize reduction 136, result has 44.3 percent of original size [2021-07-13 20:38:11,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:11,747 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-07-13 20:38:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:11,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707384341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:11,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:11,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-13 20:38:11,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487199306] [2021-07-13 20:38:11,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:11,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:11,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:11,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:11,831 INFO L87 Difference]: Start difference. First operand 1763 states and 5970 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-07-13 20:38:13,570 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-13 20:38:13,802 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-07-13 20:38:14,026 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-07-13 20:38:14,561 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-07-13 20:38:14,793 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-07-13 20:38:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:15,034 INFO L93 Difference]: Finished difference Result 3738 states and 11851 transitions. [2021-07-13 20:38:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:38:15,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-07-13 20:38:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:15,041 INFO L225 Difference]: With dead ends: 3738 [2021-07-13 20:38:15,041 INFO L226 Difference]: Without dead ends: 3681 [2021-07-13 20:38:15,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3213.7ms TimeCoverageRelationStatistics Valid=639, Invalid=2553, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:38:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-07-13 20:38:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 1801. [2021-07-13 20:38:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.397777777777778) internal successors, (6116), 1800 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6116 transitions. [2021-07-13 20:38:15,076 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6116 transitions. Word has length 26 [2021-07-13 20:38:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:15,076 INFO L482 AbstractCegarLoop]: Abstraction has 1801 states and 6116 transitions. [2021-07-13 20:38:15,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-07-13 20:38:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6116 transitions. [2021-07-13 20:38:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:15,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:15,079 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] [2021-07-13 20:38:15,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1767,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:15,279 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:15,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-07-13 20:38:15,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:15,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319543087] [2021-07-13 20:38:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:15,481 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-07-13 20:38:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:15,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319543087] [2021-07-13 20:38:15,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319543087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581070861] [2021-07-13 20:38:15,875 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 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 [2021-07-13 20:38:15,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:15,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:38:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:16,331 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:38:16,563 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:38:16,728 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:38:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:16,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:16,865 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:38:16,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:16,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:16,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:38:16,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,022 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:38:17,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,043 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:17,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:17,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,181 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:38:17,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,202 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:17,202 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:38:17,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,338 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:38:17,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:38:17,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,488 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:38:17,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:17,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,638 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:38:17,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,658 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:38:17,662 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,789 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:38:17,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,807 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:38:17,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:17,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:17,944 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:38:17,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:17,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:17,970 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:357 [2021-07-13 20:38:18,183 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-07-13 20:38:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:18,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581070861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:18,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:18,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:38:18,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623909660] [2021-07-13 20:38:18,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:18,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:18,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:18,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:18,304 INFO L87 Difference]: Start difference. First operand 1801 states and 6116 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) [2021-07-13 20:38:19,196 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-13 20:38:19,406 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-07-13 20:38:19,649 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-07-13 20:38:19,916 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-13 20:38:20,148 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:38:20,385 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-13 20:38:20,886 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-13 20:38:21,277 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2021-07-13 20:38:21,872 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 67 [2021-07-13 20:38:22,347 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-07-13 20:38:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:22,530 INFO L93 Difference]: Finished difference Result 2391 states and 7895 transitions. [2021-07-13 20:38:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:38:22,530 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 [2021-07-13 20:38:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:22,535 INFO L225 Difference]: With dead ends: 2391 [2021-07-13 20:38:22,535 INFO L226 Difference]: Without dead ends: 2361 [2021-07-13 20:38:22,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4626.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:38:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-07-13 20:38:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1809. [2021-07-13 20:38:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.396017699115044) internal successors, (6140), 1808 states have internal predecessors, (6140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6140 transitions. [2021-07-13 20:38:22,560 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6140 transitions. Word has length 26 [2021-07-13 20:38:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:22,560 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 6140 transitions. [2021-07-13 20:38:22,561 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) [2021-07-13 20:38:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6140 transitions. [2021-07-13 20:38:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:22,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:22,563 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] [2021-07-13 20:38:22,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1868 [2021-07-13 20:38:22,766 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-07-13 20:38:22,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:22,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819220295] [2021-07-13 20:38:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:23,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:23,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819220295] [2021-07-13 20:38:23,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819220295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:23,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231231010] [2021-07-13 20:38:23,110 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 [2021-07-13 20:38:23,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:23,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:38:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:23,483 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:38:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,556 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 [2021-07-13 20:38:23,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,671 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:38:23,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,684 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:23,684 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 [2021-07-13 20:38:23,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,793 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:38:23,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:38:23,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:23,910 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:38:23,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:23,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:23,922 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 [2021-07-13 20:38:23,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:24,026 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:38:24,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:24,038 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:24,038 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 [2021-07-13 20:38:24,040 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:24,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:24,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,152 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 [2021-07-13 20:38:24,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:24,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:24,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,264 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 [2021-07-13 20:38:24,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:24,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:24,370 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:24,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:38:24,372 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:24,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:24,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:24,467 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:38:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:24,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231231010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:24,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:24,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:38:24,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159443339] [2021-07-13 20:38:24,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:24,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:24,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:24,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:24,655 INFO L87 Difference]: Start difference. First operand 1809 states and 6140 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) [2021-07-13 20:38:24,980 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-13 20:38:25,485 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-13 20:38:25,877 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-07-13 20:38:26,037 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-13 20:38:26,304 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:38:26,789 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-13 20:38:26,986 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-13 20:38:27,238 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-13 20:38:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:27,336 INFO L93 Difference]: Finished difference Result 2637 states and 8679 transitions. [2021-07-13 20:38:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:38:27,336 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 [2021-07-13 20:38:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:27,341 INFO L225 Difference]: With dead ends: 2637 [2021-07-13 20:38:27,341 INFO L226 Difference]: Without dead ends: 2603 [2021-07-13 20:38:27,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2895.4ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:38:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-13 20:38:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1822. [2021-07-13 20:38:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-07-13 20:38:27,371 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-07-13 20:38:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:27,372 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-07-13 20:38:27,372 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) [2021-07-13 20:38:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-07-13 20:38:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:27,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:27,374 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] [2021-07-13 20:38:27,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1895,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:27,575 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-07-13 20:38:27,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:27,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771425523] [2021-07-13 20:38:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:27,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:27,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771425523] [2021-07-13 20:38:27,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771425523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:27,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968565999] [2021-07-13 20:38:27,897 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 [2021-07-13 20:38:27,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:27,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:28,243 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-07-13 20:38:28,403 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_156, v_prenex_158], 6=[v_prenex_157]} [2021-07-13 20:38:28,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,427 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:28,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:28,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,451 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:28,452 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:38:28,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,618 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:38:28,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:28,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:28,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,660 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:38:28,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:28,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,809 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:38:28,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:28,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:28,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:28,850 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:28,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:28,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:29,134 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-07-13 20:38:29,134 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-07-13 20:38:29,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:29,157 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:38:29,157 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:38:29,158 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:29,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:29,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:29,172 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 [2021-07-13 20:38:29,177 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:29,437 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-13 20:38:29,437 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-07-13 20:38:29,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:29,455 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:373, output treesize:323 [2021-07-13 20:38:29,668 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-07-13 20:38:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:29,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968565999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:29,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:29,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:38:29,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965232147] [2021-07-13 20:38:29,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:29,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:29,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:29,779 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 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) [2021-07-13 20:38:29,928 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 27 [2021-07-13 20:38:30,733 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-07-13 20:38:31,885 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-07-13 20:38:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:31,931 INFO L93 Difference]: Finished difference Result 2416 states and 8045 transitions. [2021-07-13 20:38:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:38:31,931 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 [2021-07-13 20:38:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:31,935 INFO L225 Difference]: With dead ends: 2416 [2021-07-13 20:38:31,935 INFO L226 Difference]: Without dead ends: 2391 [2021-07-13 20:38:31,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2434.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:38:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-13 20:38:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1822. [2021-07-13 20:38:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-07-13 20:38:31,960 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-07-13 20:38:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:31,960 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-07-13 20:38:31,961 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) [2021-07-13 20:38:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-07-13 20:38:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:31,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:31,963 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] [2021-07-13 20:38:32,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1911,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:32,164 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:32,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-07-13 20:38:32,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:32,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32082274] [2021-07-13 20:38:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:32,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32082274] [2021-07-13 20:38:32,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32082274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:32,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926310349] [2021-07-13 20:38:32,749 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 [2021-07-13 20:38:32,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:38:32,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:32,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:33,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,330 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 [2021-07-13 20:38:33,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,341 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 [2021-07-13 20:38:33,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,354 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 43 treesize of output 16 [2021-07-13 20:38:33,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:33,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,377 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 [2021-07-13 20:38:33,378 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,386 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 [2021-07-13 20:38:33,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,395 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 25 treesize of output 13 [2021-07-13 20:38:33,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,409 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 45 treesize of output 19 [2021-07-13 20:38:33,410 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:33,421 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,429 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 [2021-07-13 20:38:33,430 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,438 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 [2021-07-13 20:38:33,439 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,446 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 [2021-07-13 20:38:33,447 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,456 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 41 treesize of output 19 [2021-07-13 20:38:33,458 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,465 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 [2021-07-13 20:38:33,466 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:33,475 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:33,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:33,480 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 [2021-07-13 20:38:33,482 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:33,539 INFO L628 ElimStorePlain]: treesize reduction 223, result has 12.9 percent of original size [2021-07-13 20:38:33,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:33,541 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-07-13 20:38:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:33,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926310349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:33,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:33,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:38:33,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407244842] [2021-07-13 20:38:33,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:33,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:33,573 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 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) [2021-07-13 20:38:34,097 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-07-13 20:38:35,252 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-13 20:38:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:35,311 INFO L93 Difference]: Finished difference Result 2280 states and 7549 transitions. [2021-07-13 20:38:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:38:35,312 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 [2021-07-13 20:38:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:35,315 INFO L225 Difference]: With dead ends: 2280 [2021-07-13 20:38:35,316 INFO L226 Difference]: Without dead ends: 2258 [2021-07-13 20:38:35,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2172.0ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:38:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-07-13 20:38:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1818. [2021-07-13 20:38:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-07-13 20:38:35,341 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-07-13 20:38:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:35,341 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-07-13 20:38:35,341 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) [2021-07-13 20:38:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-07-13 20:38:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:35,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:35,343 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] [2021-07-13 20:38:35,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1967 [2021-07-13 20:38:35,544 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:35,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-07-13 20:38:35,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:35,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852284050] [2021-07-13 20:38:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:36,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:36,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852284050] [2021-07-13 20:38:36,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852284050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:36,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892020075] [2021-07-13 20:38:36,180 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 [2021-07-13 20:38:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:36,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:36,532 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_161], 5=[v_prenex_163, v_prenex_159]} [2021-07-13 20:38:36,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,540 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 23 treesize of output 13 [2021-07-13 20:38:36,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:36,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-07-13 20:38:36,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:36,630 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-07-13 20:38:36,630 INFO L518 ElimStorePlain]: Eliminatee v_prenex_161 vanished before elimination [2021-07-13 20:38:36,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:38:36,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:36,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:36,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,668 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 25 treesize of output 13 [2021-07-13 20:38:36,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:36,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:36,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:38:36,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:43 [2021-07-13 20:38:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:36,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892020075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:36,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:36,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:38:36,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714668124] [2021-07-13 20:38:36,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:36,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:36,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:36,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:36,752 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 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) [2021-07-13 20:38:37,328 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-07-13 20:38:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:38,643 INFO L93 Difference]: Finished difference Result 2473 states and 8184 transitions. [2021-07-13 20:38:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:38:38,643 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 [2021-07-13 20:38:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:38,647 INFO L225 Difference]: With dead ends: 2473 [2021-07-13 20:38:38,647 INFO L226 Difference]: Without dead ends: 2458 [2021-07-13 20:38:38,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2331.4ms TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:38:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-07-13 20:38:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1818. [2021-07-13 20:38:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-07-13 20:38:38,675 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-07-13 20:38:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:38,675 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-07-13 20:38:38,675 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) [2021-07-13 20:38:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-07-13 20:38:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:38,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:38,677 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] [2021-07-13 20:38:38,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2057 [2021-07-13 20:38:38,882 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:38,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:38,882 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-07-13 20:38:38,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:38,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564713499] [2021-07-13 20:38:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:39,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:39,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564713499] [2021-07-13 20:38:39,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564713499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:39,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113276909] [2021-07-13 20:38:39,327 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 [2021-07-13 20:38:39,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:39,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:39,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:38:39,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:39,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,919 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:39,919 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 [2021-07-13 20:38:39,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:39,988 INFO L354 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2021-07-13 20:38:39,988 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 40 [2021-07-13 20:38:39,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,050 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:38:40,050 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 37 treesize of output 51 [2021-07-13 20:38:40,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,106 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:40,106 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 39 treesize of output 55 [2021-07-13 20:38:40,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,159 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:38:40,159 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 37 treesize of output 47 [2021-07-13 20:38:40,162 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,206 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:38:40,206 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 44 [2021-07-13 20:38:40,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,262 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:40,262 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 [2021-07-13 20:38:40,272 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,321 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-13 20:38:40,321 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 [2021-07-13 20:38:40,325 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:40,362 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 [2021-07-13 20:38:40,394 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,444 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:40,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:40,450 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:40,488 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 37 treesize of output 63 [2021-07-13 20:38:40,500 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,521 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:40,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:38:40,522 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,565 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:38:40,566 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-07-13 20:38:40,571 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,591 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:40,591 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 37 treesize of output 1 [2021-07-13 20:38:40,592 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,629 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-07-13 20:38:40,630 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 39 treesize of output 37 [2021-07-13 20:38:40,631 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:40,643 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:40,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:40,644 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:41,107 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-07-13 20:38:41,107 INFO L628 ElimStorePlain]: treesize reduction 411, result has 45.1 percent of original size [2021-07-13 20:38:41,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:41,115 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:389 [2021-07-13 20:38:41,405 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-07-13 20:38:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:41,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113276909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:41,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:41,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:38:41,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451983020] [2021-07-13 20:38:41,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:38:41,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:38:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:38:41,525 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-07-13 20:38:42,196 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-07-13 20:38:42,724 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-13 20:38:43,221 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-07-13 20:38:43,450 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-07-13 20:38:43,743 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:38:44,183 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 20:38:44,331 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-07-13 20:38:44,916 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-13 20:38:45,238 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-13 20:38:45,457 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-13 20:38:45,699 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-07-13 20:38:45,888 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-13 20:38:46,021 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:38:46,332 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-07-13 20:38:46,608 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-13 20:38:46,858 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 20:38:47,364 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-07-13 20:38:47,493 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-07-13 20:38:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:48,068 INFO L93 Difference]: Finished difference Result 3328 states and 10546 transitions. [2021-07-13 20:38:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:38:48,069 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 [2021-07-13 20:38:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:48,075 INFO L225 Difference]: With dead ends: 3328 [2021-07-13 20:38:48,075 INFO L226 Difference]: Without dead ends: 3272 [2021-07-13 20:38:48,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 6536.2ms TimeCoverageRelationStatistics Valid=856, Invalid=4400, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:38:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-07-13 20:38:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 1831. [2021-07-13 20:38:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.40327868852459) internal successors, (6228), 1830 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6228 transitions. [2021-07-13 20:38:48,109 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6228 transitions. Word has length 26 [2021-07-13 20:38:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:48,109 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6228 transitions. [2021-07-13 20:38:48,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-07-13 20:38:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6228 transitions. [2021-07-13 20:38:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:48,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:48,112 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] [2021-07-13 20:38:48,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:48,314 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-07-13 20:38:48,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:48,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570686609] [2021-07-13 20:38:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:48,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:48,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570686609] [2021-07-13 20:38:48,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570686609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:48,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841089594] [2021-07-13 20:38:48,849 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 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 [2021-07-13 20:38:48,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:38:48,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:48,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:38:48,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:49,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,579 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:49,579 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 [2021-07-13 20:38:49,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,637 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:49,637 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 [2021-07-13 20:38:49,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,682 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-07-13 20:38:49,683 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 37 treesize of output 36 [2021-07-13 20:38:49,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,737 INFO L354 Elim1Store]: treesize reduction 4, result has 91.1 percent of original size [2021-07-13 20:38:49,737 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 59 [2021-07-13 20:38:49,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,767 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:49,767 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 37 treesize of output 1 [2021-07-13 20:38:49,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:49,808 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-13 20:38:49,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,882 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:38:49,882 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 44 [2021-07-13 20:38:49,888 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,937 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-13 20:38:49,937 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 [2021-07-13 20:38:49,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:49,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:49,989 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-07-13 20:38:49,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 42 [2021-07-13 20:38:49,992 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:50,012 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:50,013 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 1 [2021-07-13 20:38:50,013 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:50,057 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:38:50,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 44 [2021-07-13 20:38:50,062 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:50,096 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-07-13 20:38:50,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 29 [2021-07-13 20:38:50,098 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:50,119 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:50,119 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 39 treesize of output 1 [2021-07-13 20:38:50,120 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:50,140 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:50,140 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 [2021-07-13 20:38:50,141 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:50,186 INFO L354 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2021-07-13 20:38:50,187 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 37 treesize of output 48 [2021-07-13 20:38:50,189 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:50,202 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-13 20:38:50,202 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 37 treesize of output 1 [2021-07-13 20:38:50,203 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:50,720 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-13 20:38:50,721 INFO L628 ElimStorePlain]: treesize reduction 174, result has 69.4 percent of original size [2021-07-13 20:38:50,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-13 20:38:50,728 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:461 [2021-07-13 20:38:51,026 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-07-13 20:38:51,321 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:38:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:51,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841089594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:51,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:51,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:38:51,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217039054] [2021-07-13 20:38:51,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:38:51,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:51,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:38:51,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:38:51,471 INFO L87 Difference]: Start difference. First operand 1831 states and 6228 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) [2021-07-13 20:38:52,254 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-07-13 20:38:52,468 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-13 20:38:52,606 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-07-13 20:38:53,487 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-07-13 20:38:53,885 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-13 20:38:54,018 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-13 20:38:54,191 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-13 20:38:54,330 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-13 20:38:54,512 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:38:54,953 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:38:55,444 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-07-13 20:38:55,763 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-13 20:38:56,082 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 20:38:56,439 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2021-07-13 20:38:56,959 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-07-13 20:38:57,141 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 39 [2021-07-13 20:38:57,273 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-13 20:38:57,870 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-07-13 20:38:58,268 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-13 20:38:58,647 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-13 20:38:59,130 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-13 20:38:59,434 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-07-13 20:38:59,957 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-07-13 20:39:00,094 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 32 [2021-07-13 20:39:00,261 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 37 [2021-07-13 20:39:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:00,395 INFO L93 Difference]: Finished difference Result 3152 states and 10146 transitions. [2021-07-13 20:39:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:39:00,395 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 [2021-07-13 20:39:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:00,401 INFO L225 Difference]: With dead ends: 3152 [2021-07-13 20:39:00,401 INFO L226 Difference]: Without dead ends: 3089 [2021-07-13 20:39:00,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 9420.1ms TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:39:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-07-13 20:39:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1811. [2021-07-13 20:39:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.4027624309392266) internal successors, (6159), 1810 states have internal predecessors, (6159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6159 transitions. [2021-07-13 20:39:00,436 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6159 transitions. Word has length 26 [2021-07-13 20:39:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:00,436 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6159 transitions. [2021-07-13 20:39:00,436 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) [2021-07-13 20:39:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6159 transitions. [2021-07-13 20:39:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:00,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:00,439 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] [2021-07-13 20:39:00,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-07-13 20:39:00,639 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:00,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:00,639 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-07-13 20:39:00,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:00,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779105879] [2021-07-13 20:39:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:00,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:00,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779105879] [2021-07-13 20:39:00,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779105879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:00,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160824803] [2021-07-13 20:39:00,995 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 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 [2021-07-13 20:39:01,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:01,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:01,718 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-07-13 20:39:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:01,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:01,954 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 21 treesize of output 37 [2021-07-13 20:39:01,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:01,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:01,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:01,991 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-13 20:39:01,991 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 26 treesize of output 32 [2021-07-13 20:39:01,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,273 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-07-13 20:39:02,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:02,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,314 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:39:02,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-07-13 20:39:02,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,350 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:39:02,351 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 26 treesize of output 36 [2021-07-13 20:39:02,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,628 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-07-13 20:39:02,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,658 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-13 20:39:02,658 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 24 [2021-07-13 20:39:02,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,685 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:02,685 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 [2021-07-13 20:39:02,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,151 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 115 [2021-07-13 20:39:03,152 INFO L628 ElimStorePlain]: treesize reduction 38, result has 92.7 percent of original size [2021-07-13 20:39:03,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:03,195 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 43 [2021-07-13 20:39:03,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,235 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-13 20:39:03,235 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 39 [2021-07-13 20:39:03,257 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,687 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2021-07-13 20:39:03,687 INFO L628 ElimStorePlain]: treesize reduction 47, result has 90.4 percent of original size [2021-07-13 20:39:03,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:03,717 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 43 [2021-07-13 20:39:03,723 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,752 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-13 20:39:03,752 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 35 treesize of output 26 [2021-07-13 20:39:03,753 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,943 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:39:03,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,974 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-13 20:39:03,974 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 31 [2021-07-13 20:39:03,978 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:03,991 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-07-13 20:39:03,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-07-13 20:39:03,992 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:04,144 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-13 20:39:04,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:04,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:39:04,157 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:621, output treesize:257 [2021-07-13 20:39:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:04,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160824803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:04,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:04,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:39:04,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929771363] [2021-07-13 20:39:04,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:04,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:04,316 INFO L87 Difference]: Start difference. First operand 1811 states and 6159 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) [2021-07-13 20:39:04,645 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-07-13 20:39:05,525 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:39:06,391 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-07-13 20:39:06,880 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-07-13 20:39:07,416 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102 [2021-07-13 20:39:07,549 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-13 20:39:07,804 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-07-13 20:39:07,970 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-07-13 20:39:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:08,409 INFO L93 Difference]: Finished difference Result 3034 states and 9904 transitions. [2021-07-13 20:39:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:39:08,409 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 [2021-07-13 20:39:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:08,414 INFO L225 Difference]: With dead ends: 3034 [2021-07-13 20:39:08,415 INFO L226 Difference]: Without dead ends: 2983 [2021-07-13 20:39:08,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 4280.5ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:39:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-07-13 20:39:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1871. [2021-07-13 20:39:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.411229946524064) internal successors, (6379), 1870 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6379 transitions. [2021-07-13 20:39:08,446 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6379 transitions. Word has length 26 [2021-07-13 20:39:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:08,446 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6379 transitions. [2021-07-13 20:39:08,446 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) [2021-07-13 20:39:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6379 transitions. [2021-07-13 20:39:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:08,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:08,448 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] [2021-07-13 20:39:08,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2412,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:08,649 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:08,649 INFO L82 PathProgramCache]: Analyzing trace with hash 227092556, now seen corresponding path program 53 times [2021-07-13 20:39:08,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:08,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996338820] [2021-07-13 20:39:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:09,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:09,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996338820] [2021-07-13 20:39:09,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996338820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:09,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413832508] [2021-07-13 20:39:09,006 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 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 [2021-07-13 20:39:09,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:39:09,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:09,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,512 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 [2021-07-13 20:39:09,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,521 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 [2021-07-13 20:39:09,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,529 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 [2021-07-13 20:39:09,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,537 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 [2021-07-13 20:39:09,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,545 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 [2021-07-13 20:39:09,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,554 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 [2021-07-13 20:39:09,554 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,562 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 [2021-07-13 20:39:09,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,570 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 [2021-07-13 20:39:09,570 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:39:09,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,586 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 [2021-07-13 20:39:09,586 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,594 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 [2021-07-13 20:39:09,595 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,602 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 [2021-07-13 20:39:09,603 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:39:09,611 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:39:09,619 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:39:09,627 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:09,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:09,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:39:09,632 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:09,665 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-13 20:39:09,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:39:09,666 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-13 20:39:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:09,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413832508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:09,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:09,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:39:09,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691976258] [2021-07-13 20:39:09,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:09,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:09,703 INFO L87 Difference]: Start difference. First operand 1871 states and 6379 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) [2021-07-13 20:39:10,940 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:39:11,069 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-07-13 20:39:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:11,168 INFO L93 Difference]: Finished difference Result 2487 states and 8126 transitions. [2021-07-13 20:39:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:39:11,168 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 [2021-07-13 20:39:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:11,182 INFO L225 Difference]: With dead ends: 2487 [2021-07-13 20:39:11,182 INFO L226 Difference]: Without dead ends: 2449 [2021-07-13 20:39:11,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1652.0ms TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:39:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-07-13 20:39:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1871. [2021-07-13 20:39:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.409090909090909) internal successors, (6375), 1870 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6375 transitions. [2021-07-13 20:39:11,207 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6375 transitions. Word has length 26 [2021-07-13 20:39:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:11,208 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6375 transitions. [2021-07-13 20:39:11,208 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) [2021-07-13 20:39:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6375 transitions. [2021-07-13 20:39:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:11,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:11,211 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] [2021-07-13 20:39:11,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2497 [2021-07-13 20:39:11,411 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:11,412 INFO L82 PathProgramCache]: Analyzing trace with hash -538930356, now seen corresponding path program 54 times [2021-07-13 20:39:11,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:11,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461887111] [2021-07-13 20:39:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:11,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461887111] [2021-07-13 20:39:11,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461887111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788329921] [2021-07-13 20:39:11,844 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 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 [2021-07-13 20:39:11,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:12,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,100 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:39:12,100 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 31 [2021-07-13 20:39:12,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,126 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:39:12,126 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 28 [2021-07-13 20:39:12,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,160 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-07-13 20:39:12,160 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 25 [2021-07-13 20:39:12,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,177 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:39:12,177 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 [2021-07-13 20:39:12,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,203 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:39:12,203 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 28 [2021-07-13 20:39:12,204 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,228 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:39:12,228 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 39 treesize of output 28 [2021-07-13 20:39:12,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,244 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:39:12,244 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 [2021-07-13 20:39:12,245 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,268 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-13 20:39:12,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 26 [2021-07-13 20:39:12,270 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,284 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:39:12,284 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 [2021-07-13 20:39:12,285 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,300 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:39:12,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:39:12,301 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,317 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:39:12,317 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 [2021-07-13 20:39:12,317 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,340 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-13 20:39:12,340 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 24 [2021-07-13 20:39:12,342 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,365 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-13 20:39:12,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:39:12,367 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:12,390 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 [2021-07-13 20:39:12,424 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,446 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:39:12,446 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 [2021-07-13 20:39:12,448 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,456 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:39:12,457 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 37 treesize of output 1 [2021-07-13 20:39:12,457 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,549 INFO L628 ElimStorePlain]: treesize reduction 122, result has 43.3 percent of original size [2021-07-13 20:39:12,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:12,550 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:93 [2021-07-13 20:39:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:12,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788329921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:12,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:12,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:39:12,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11822635] [2021-07-13 20:39:12,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:12,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:12,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:12,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:12,648 INFO L87 Difference]: Start difference. First operand 1871 states and 6375 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) [2021-07-13 20:39:13,091 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-13 20:39:13,518 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-07-13 20:39:13,921 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-07-13 20:39:14,038 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-07-13 20:39:14,348 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-07-13 20:39:15,058 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-13 20:39:15,383 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-07-13 20:39:15,615 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-07-13 20:39:15,915 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-13 20:39:16,090 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-07-13 20:39:16,304 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-07-13 20:39:16,558 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-07-13 20:39:16,830 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-13 20:39:17,055 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2021-07-13 20:39:17,335 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-07-13 20:39:17,659 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2021-07-13 20:39:17,970 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-07-13 20:39:18,309 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-07-13 20:39:18,511 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-07-13 20:39:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:18,712 INFO L93 Difference]: Finished difference Result 3107 states and 9967 transitions. [2021-07-13 20:39:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:39:18,712 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 [2021-07-13 20:39:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:18,718 INFO L225 Difference]: With dead ends: 3107 [2021-07-13 20:39:18,718 INFO L226 Difference]: Without dead ends: 3069 [2021-07-13 20:39:18,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 5891.3ms TimeCoverageRelationStatistics Valid=747, Invalid=2913, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:39:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-07-13 20:39:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1881. [2021-07-13 20:39:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 3.4159574468085108) internal successors, (6422), 1880 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6422 transitions. [2021-07-13 20:39:18,751 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6422 transitions. Word has length 26 [2021-07-13 20:39:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:18,752 INFO L482 AbstractCegarLoop]: Abstraction has 1881 states and 6422 transitions. [2021-07-13 20:39:18,752 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) [2021-07-13 20:39:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6422 transitions. [2021-07-13 20:39:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:18,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:18,755 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] [2021-07-13 20:39:18,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:18,955 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-07-13 20:39:18,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:18,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233341800] [2021-07-13 20:39:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:19,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:19,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233341800] [2021-07-13 20:39:19,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233341800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:19,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894897957] [2021-07-13 20:39:19,398 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 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 [2021-07-13 20:39:19,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:19,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:19,834 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:39:20,015 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:39:20,065 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_191, v_prenex_189], 2=[v_prenex_190, A]} [2021-07-13 20:39:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,071 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 [2021-07-13 20:39:20,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,076 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 [2021-07-13 20:39:20,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,215 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:39:20,215 INFO L628 ElimStorePlain]: treesize reduction 118, result has 55.1 percent of original size [2021-07-13 20:39:20,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,220 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 [2021-07-13 20:39:20,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:20,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:20,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:20,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:20,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:20,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:20,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:20,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:20,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:20,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:20,376 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:293, output treesize:51 [2021-07-13 20:39:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:20,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894897957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:20,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:20,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:39:20,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489245938] [2021-07-13 20:39:20,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:20,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:20,463 INFO L87 Difference]: Start difference. First operand 1881 states and 6422 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) [2021-07-13 20:39:21,215 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-13 20:39:21,489 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 20:39:21,718 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-13 20:39:21,971 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-13 20:39:22,221 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-13 20:39:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:22,353 INFO L93 Difference]: Finished difference Result 2308 states and 7739 transitions. [2021-07-13 20:39:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:39:22,354 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 [2021-07-13 20:39:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:22,358 INFO L225 Difference]: With dead ends: 2308 [2021-07-13 20:39:22,358 INFO L226 Difference]: Without dead ends: 2293 [2021-07-13 20:39:22,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2362.5ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:39:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-07-13 20:39:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1873. [2021-07-13 20:39:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 3.419337606837607) internal successors, (6401), 1872 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6401 transitions. [2021-07-13 20:39:22,387 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6401 transitions. Word has length 26 [2021-07-13 20:39:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:22,387 INFO L482 AbstractCegarLoop]: Abstraction has 1873 states and 6401 transitions. [2021-07-13 20:39:22,387 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) [2021-07-13 20:39:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6401 transitions. [2021-07-13 20:39:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:22,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:22,389 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] [2021-07-13 20:39:22,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2618 [2021-07-13 20:39:22,590 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:22,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-07-13 20:39:22,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:22,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117845741] [2021-07-13 20:39:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:22,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:22,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117845741] [2021-07-13 20:39:22,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117845741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:22,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726806425] [2021-07-13 20:39:22,978 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 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 [2021-07-13 20:39:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:23,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:23,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:23,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:23,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,363 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:23,364 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,370 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:23,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,376 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,382 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,407 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,413 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:23,419 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,423 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 26 treesize of output 13 [2021-07-13 20:39:23,424 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:23,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:23,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:23,428 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:23,505 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:39:23,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:23,507 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:39:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:23,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726806425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:23,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:23,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:39:23,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483940113] [2021-07-13 20:39:23,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:23,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:23,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:23,565 INFO L87 Difference]: Start difference. First operand 1873 states and 6401 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) [2021-07-13 20:39:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:23,999 INFO L93 Difference]: Finished difference Result 2211 states and 7445 transitions. [2021-07-13 20:39:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:39:24,000 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 [2021-07-13 20:39:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:24,004 INFO L225 Difference]: With dead ends: 2211 [2021-07-13 20:39:24,004 INFO L226 Difference]: Without dead ends: 2196 [2021-07-13 20:39:24,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-07-13 20:39:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1867. [2021-07-13 20:39:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4190782422293675) internal successors, (6380), 1866 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6380 transitions. [2021-07-13 20:39:24,032 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6380 transitions. Word has length 26 [2021-07-13 20:39:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:24,032 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6380 transitions. [2021-07-13 20:39:24,032 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) [2021-07-13 20:39:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6380 transitions. [2021-07-13 20:39:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:24,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:24,036 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] [2021-07-13 20:39:24,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2631 [2021-07-13 20:39:24,256 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:24,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-07-13 20:39:24,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:24,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020157122] [2021-07-13 20:39:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:24,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:24,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020157122] [2021-07-13 20:39:24,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020157122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:24,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044588627] [2021-07-13 20:39:24,677 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 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 [2021-07-13 20:39:24,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:24,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:24,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:24,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:24,981 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:24,981 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 [2021-07-13 20:39:24,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:24,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:24,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:24,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,008 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:25,009 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 [2021-07-13 20:39:25,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,019 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,019 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 [2021-07-13 20:39:25,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,032 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:25,032 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 [2021-07-13 20:39:25,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,042 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,042 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 [2021-07-13 20:39:25,043 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:25,059 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,069 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,069 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 36 treesize of output 22 [2021-07-13 20:39:25,070 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,081 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 26 treesize of output 24 [2021-07-13 20:39:25,083 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,093 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,093 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 [2021-07-13 20:39:25,094 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:25,108 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,118 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:25,119 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,129 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 [2021-07-13 20:39:25,129 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,141 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 [2021-07-13 20:39:25,142 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,151 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:25,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:25,152 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:25,160 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:25,160 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 [2021-07-13 20:39:25,161 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:25,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:25,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:25,251 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-07-13 20:39:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:25,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044588627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:25,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:25,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465237796] [2021-07-13 20:39:25,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:25,435 INFO L87 Difference]: Start difference. First operand 1867 states and 6380 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) [2021-07-13 20:39:25,981 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-13 20:39:26,568 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2021-07-13 20:39:26,956 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-07-13 20:39:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:27,111 INFO L93 Difference]: Finished difference Result 2784 states and 9269 transitions. [2021-07-13 20:39:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:39:27,113 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 [2021-07-13 20:39:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:27,119 INFO L225 Difference]: With dead ends: 2784 [2021-07-13 20:39:27,119 INFO L226 Difference]: Without dead ends: 2769 [2021-07-13 20:39:27,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1963.6ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:39:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-07-13 20:39:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1864. [2021-07-13 20:39:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.416532474503489) internal successors, (6365), 1863 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6365 transitions. [2021-07-13 20:39:27,153 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6365 transitions. Word has length 26 [2021-07-13 20:39:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:27,153 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 6365 transitions. [2021-07-13 20:39:27,153 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) [2021-07-13 20:39:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6365 transitions. [2021-07-13 20:39:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:27,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:27,156 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] [2021-07-13 20:39:27,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2659 [2021-07-13 20:39:27,361 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 33 times [2021-07-13 20:39:27,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:27,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460617064] [2021-07-13 20:39:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:27,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:27,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460617064] [2021-07-13 20:39:27,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460617064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:27,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829574773] [2021-07-13 20:39:27,745 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 [2021-07-13 20:39:27,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:27,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:28,088 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:39:28,325 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:39:28,408 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_201], 2=[v_prenex_199, v_prenex_200]} [2021-07-13 20:39:28,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,413 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 [2021-07-13 20:39:28,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,535 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 20:39:28,536 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.9 percent of original size [2021-07-13 20:39:28,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,540 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 [2021-07-13 20:39:28,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:28,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:28,596 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:28,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:28,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:28,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:28,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:28,648 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:28,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:28,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:28,691 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:217, output treesize:51 [2021-07-13 20:39:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:28,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829574773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:28,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:28,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:28,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653445671] [2021-07-13 20:39:28,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:28,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:28,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:28,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:28,747 INFO L87 Difference]: Start difference. First operand 1864 states and 6365 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) [2021-07-13 20:39:29,994 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:39:30,435 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-13 20:39:30,752 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-13 20:39:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:30,914 INFO L93 Difference]: Finished difference Result 2480 states and 8310 transitions. [2021-07-13 20:39:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:39:30,914 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 [2021-07-13 20:39:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:30,919 INFO L225 Difference]: With dead ends: 2480 [2021-07-13 20:39:30,919 INFO L226 Difference]: Without dead ends: 2465 [2021-07-13 20:39:30,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2538.0ms TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:39:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-07-13 20:39:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1863. [2021-07-13 20:39:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4162191192266382) internal successors, (6361), 1862 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6361 transitions. [2021-07-13 20:39:30,951 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6361 transitions. Word has length 26 [2021-07-13 20:39:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:30,951 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6361 transitions. [2021-07-13 20:39:30,952 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) [2021-07-13 20:39:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6361 transitions. [2021-07-13 20:39:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:30,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:30,955 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] [2021-07-13 20:39:31,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2696 [2021-07-13 20:39:31,155 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1946185846, now seen corresponding path program 34 times [2021-07-13 20:39:31,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:31,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899385544] [2021-07-13 20:39:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:31,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:31,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899385544] [2021-07-13 20:39:31,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899385544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:31,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044292587] [2021-07-13 20:39:31,462 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 [2021-07-13 20:39:31,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:31,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:31,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:31,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:31,770 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:39:31,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:31,883 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:31,883 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 28 treesize of output 20 [2021-07-13 20:39:31,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:31,998 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:39:31,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:32,011 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:32,011 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 [2021-07-13 20:39:32,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:32,122 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:39:32,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:32,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,134 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 33 treesize of output 27 [2021-07-13 20:39:32,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:32,245 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:39:32,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:32,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,258 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 [2021-07-13 20:39:32,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:32,366 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-07-13 20:39:32,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:32,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,379 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 [2021-07-13 20:39:32,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:32,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:32,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,492 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 [2021-07-13 20:39:32,494 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:32,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:32,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,614 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 [2021-07-13 20:39:32,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:32,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:32,718 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:32,719 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 [2021-07-13 20:39:32,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:32,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:32,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:32,815 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:39:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:32,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044292587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:32,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:32,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:32,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886442590] [2021-07-13 20:39:32,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:32,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:32,997 INFO L87 Difference]: Start difference. First operand 1863 states and 6361 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) [2021-07-13 20:39:33,573 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2021-07-13 20:39:34,012 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-13 20:39:34,511 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:39:34,896 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-07-13 20:39:35,096 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-07-13 20:39:35,357 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-13 20:39:35,506 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-13 20:39:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:35,583 INFO L93 Difference]: Finished difference Result 2968 states and 9767 transitions. [2021-07-13 20:39:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:39:35,583 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 [2021-07-13 20:39:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:35,588 INFO L225 Difference]: With dead ends: 2968 [2021-07-13 20:39:35,588 INFO L226 Difference]: Without dead ends: 2938 [2021-07-13 20:39:35,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2886.4ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:39:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-07-13 20:39:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1863. [2021-07-13 20:39:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4183673469387754) internal successors, (6365), 1862 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6365 transitions. [2021-07-13 20:39:35,622 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6365 transitions. Word has length 26 [2021-07-13 20:39:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:35,623 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6365 transitions. [2021-07-13 20:39:35,623 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) [2021-07-13 20:39:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6365 transitions. [2021-07-13 20:39:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:35,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:35,625 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] [2021-07-13 20:39:35,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2705,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:35,826 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:35,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:35,826 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 35 times [2021-07-13 20:39:35,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:35,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941215030] [2021-07-13 20:39:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:36,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:36,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941215030] [2021-07-13 20:39:36,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941215030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:36,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381312237] [2021-07-13 20:39:36,214 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 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 [2021-07-13 20:39:36,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:36,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:39:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:36,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:36,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:36,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:36,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:36,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:36,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:36,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:36,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:36,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:36,671 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,677 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 33 treesize of output 19 [2021-07-13 20:39:36,678 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:36,685 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:36,692 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:36,699 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,704 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 [2021-07-13 20:39:36,705 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:36,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:36,709 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:39:36,709 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:36,787 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:39:36,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:36,788 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:39:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:36,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381312237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:36,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:36,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:36,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290244650] [2021-07-13 20:39:36,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:36,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:36,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:36,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:36,842 INFO L87 Difference]: Start difference. First operand 1863 states and 6365 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) [2021-07-13 20:39:37,369 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-07-13 20:39:37,693 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 20:39:37,849 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-13 20:39:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:38,040 INFO L93 Difference]: Finished difference Result 2374 states and 7932 transitions. [2021-07-13 20:39:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:39:38,041 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 [2021-07-13 20:39:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:38,045 INFO L225 Difference]: With dead ends: 2374 [2021-07-13 20:39:38,045 INFO L226 Difference]: Without dead ends: 2353 [2021-07-13 20:39:38,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1483.0ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:39:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-07-13 20:39:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1878. [2021-07-13 20:39:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.4214171550346295) internal successors, (6422), 1877 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 6422 transitions. [2021-07-13 20:39:38,071 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 6422 transitions. Word has length 26 [2021-07-13 20:39:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:38,071 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 6422 transitions. [2021-07-13 20:39:38,071 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) [2021-07-13 20:39:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 6422 transitions. [2021-07-13 20:39:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:38,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:38,074 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] [2021-07-13 20:39:38,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2720,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:38,274 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:38,275 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 36 times [2021-07-13 20:39:38,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:38,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51369731] [2021-07-13 20:39:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:38,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:38,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51369731] [2021-07-13 20:39:38,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51369731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:38,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337822218] [2021-07-13 20:39:38,514 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 [2021-07-13 20:39:38,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:38,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:38,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:38,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:38,883 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:38,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:38,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,896 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:38,896 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 31 treesize of output 19 [2021-07-13 20:39:38,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,906 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:38,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,925 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:38,926 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 28 treesize of output 28 [2021-07-13 20:39:38,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,947 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:38,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:38,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:38,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:38,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,978 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:38,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:38,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:38,999 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:38,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:39,002 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,012 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:39,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:39,013 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,022 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:39,023 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 31 treesize of output 19 [2021-07-13 20:39:39,023 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,033 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:39,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:39,033 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,042 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:39,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:39,043 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,052 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:39,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:39,053 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:39,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:39,074 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:39,090 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,103 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:39,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:39,105 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:39,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:39,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:39,215 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:255 [2021-07-13 20:39:39,385 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-13 20:39:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:39,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337822218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:39,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:39,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:39:39,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107043564] [2021-07-13 20:39:39,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:39:39,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:39:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:39:39,483 INFO L87 Difference]: Start difference. First operand 1878 states and 6422 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) [2021-07-13 20:39:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:41,455 INFO L93 Difference]: Finished difference Result 2454 states and 8038 transitions. [2021-07-13 20:39:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:39:41,456 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 [2021-07-13 20:39:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:41,459 INFO L225 Difference]: With dead ends: 2454 [2021-07-13 20:39:41,459 INFO L226 Difference]: Without dead ends: 2416 [2021-07-13 20:39:41,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1946.5ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:39:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-07-13 20:39:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1866. [2021-07-13 20:39:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.420911528150134) internal successors, (6380), 1865 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6380 transitions. [2021-07-13 20:39:41,488 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6380 transitions. Word has length 26 [2021-07-13 20:39:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:41,488 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6380 transitions. [2021-07-13 20:39:41,488 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) [2021-07-13 20:39:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6380 transitions. [2021-07-13 20:39:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:41,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:41,492 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] [2021-07-13 20:39:41,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2748,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:41,714 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:41,714 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 37 times [2021-07-13 20:39:41,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:41,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264004075] [2021-07-13 20:39:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:41,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264004075] [2021-07-13 20:39:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264004075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232408063] [2021-07-13 20:39:41,999 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 [2021-07-13 20:39:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:42,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:42,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,278 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 [2021-07-13 20:39:42,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,289 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 28 treesize of output 16 [2021-07-13 20:39:42,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,301 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 28 treesize of output 24 [2021-07-13 20:39:42,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,317 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 33 treesize of output 27 [2021-07-13 20:39:42,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,332 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:42,332 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 21 treesize of output 17 [2021-07-13 20:39:42,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,346 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:42,346 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 21 treesize of output 17 [2021-07-13 20:39:42,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,358 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,358 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 [2021-07-13 20:39:42,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,369 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 [2021-07-13 20:39:42,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,379 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,379 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 [2021-07-13 20:39:42,380 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,392 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:42,392 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 [2021-07-13 20:39:42,394 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,404 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 [2021-07-13 20:39:42,405 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,416 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 [2021-07-13 20:39:42,419 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,429 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,430 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 [2021-07-13 20:39:42,430 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,442 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 [2021-07-13 20:39:42,443 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:42,453 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:42,459 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:42,459 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 [2021-07-13 20:39:42,460 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:42,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:42,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:42,564 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-07-13 20:39:42,726 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-13 20:39:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:42,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232408063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:42,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:42,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:39:42,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032070881] [2021-07-13 20:39:42,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:42,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:42,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:42,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:42,824 INFO L87 Difference]: Start difference. First operand 1866 states and 6380 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) [2021-07-13 20:39:43,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:43,326 INFO L93 Difference]: Finished difference Result 2282 states and 7604 transitions. [2021-07-13 20:39:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:39:43,327 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 [2021-07-13 20:39:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:43,331 INFO L225 Difference]: With dead ends: 2282 [2021-07-13 20:39:43,331 INFO L226 Difference]: Without dead ends: 2257 [2021-07-13 20:39:43,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 873.8ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-07-13 20:39:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1857. [2021-07-13 20:39:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.4132543103448274) internal successors, (6335), 1856 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6335 transitions. [2021-07-13 20:39:43,356 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6335 transitions. Word has length 26 [2021-07-13 20:39:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:43,356 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6335 transitions. [2021-07-13 20:39:43,356 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) [2021-07-13 20:39:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6335 transitions. [2021-07-13 20:39:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:43,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:43,359 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] [2021-07-13 20:39:43,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2799 [2021-07-13 20:39:43,559 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:43,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 38 times [2021-07-13 20:39:43,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:43,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926101473] [2021-07-13 20:39:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:43,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:43,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926101473] [2021-07-13 20:39:43,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926101473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:43,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646160384] [2021-07-13 20:39:43,864 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 [2021-07-13 20:39:43,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:43,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:43,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:44,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:44,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,191 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 31 treesize of output 19 [2021-07-13 20:39:44,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:44,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,202 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 36 treesize of output 19 [2021-07-13 20:39:44,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:44,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,214 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 26 treesize of output 13 [2021-07-13 20:39:44,215 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,220 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 26 treesize of output 13 [2021-07-13 20:39:44,221 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,227 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:44,228 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:44,234 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:44,240 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,245 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 21 treesize of output 13 [2021-07-13 20:39:44,246 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:44,254 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:44,260 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:44,266 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:44,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:44,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:44,270 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:44,347 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:39:44,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:44,348 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:39:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:44,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646160384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:44,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:44,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:39:44,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514856425] [2021-07-13 20:39:44,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:44,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:44,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:44,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:44,433 INFO L87 Difference]: Start difference. First operand 1857 states and 6335 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) [2021-07-13 20:39:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:44,696 INFO L93 Difference]: Finished difference Result 1943 states and 6537 transitions. [2021-07-13 20:39:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:39:44,697 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 [2021-07-13 20:39:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:44,701 INFO L225 Difference]: With dead ends: 1943 [2021-07-13 20:39:44,701 INFO L226 Difference]: Without dead ends: 1924 [2021-07-13 20:39:44,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 519.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-07-13 20:39:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1834. [2021-07-13 20:39:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.413529732678669) internal successors, (6257), 1833 states have internal predecessors, (6257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6257 transitions. [2021-07-13 20:39:44,727 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6257 transitions. Word has length 26 [2021-07-13 20:39:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:44,727 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6257 transitions. [2021-07-13 20:39:44,727 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) [2021-07-13 20:39:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6257 transitions. [2021-07-13 20:39:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:44,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:44,730 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] [2021-07-13 20:39:44,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2840 [2021-07-13 20:39:44,931 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:44,931 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-07-13 20:39:44,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:44,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492670263] [2021-07-13 20:39:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:45,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:45,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492670263] [2021-07-13 20:39:45,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492670263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:45,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678578018] [2021-07-13 20:39:45,163 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 [2021-07-13 20:39:45,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:45,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:45,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,587 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:45,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:45,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:45,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,613 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:45,613 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:39:45,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:45,791 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:39:45,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:45,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,813 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:45,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:45,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:45,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:45,832 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 28 treesize of output 32 [2021-07-13 20:39:45,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,119 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-07-13 20:39:46,120 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-07-13 20:39:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:46,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:46,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:46,160 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:46,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:46,161 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,424 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-13 20:39:46,424 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.1 percent of original size [2021-07-13 20:39:46,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:46,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:46,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:46,462 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:46,462 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:39:46,464 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:46,583 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:39:46,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:46,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:46,600 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:253 [2021-07-13 20:39:46,795 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-07-13 20:39:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:46,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678578018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:46,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:46,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:39:46,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121112054] [2021-07-13 20:39:46,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:46,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:46,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:46,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:46,892 INFO L87 Difference]: Start difference. First operand 1834 states and 6257 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) [2021-07-13 20:39:47,576 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-13 20:39:47,775 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-07-13 20:39:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:47,819 INFO L93 Difference]: Finished difference Result 2041 states and 6856 transitions. [2021-07-13 20:39:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:39:47,819 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 [2021-07-13 20:39:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:47,823 INFO L225 Difference]: With dead ends: 2041 [2021-07-13 20:39:47,823 INFO L226 Difference]: Without dead ends: 2016 [2021-07-13 20:39:47,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1242.5ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:39:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-07-13 20:39:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1816. [2021-07-13 20:39:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.41763085399449) internal successors, (6203), 1815 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6203 transitions. [2021-07-13 20:39:47,846 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6203 transitions. Word has length 26 [2021-07-13 20:39:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:47,846 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6203 transitions. [2021-07-13 20:39:47,846 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) [2021-07-13 20:39:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6203 transitions. [2021-07-13 20:39:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:47,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:47,849 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] [2021-07-13 20:39:48,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2868 [2021-07-13 20:39:48,050 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:48,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:48,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-07-13 20:39:48,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:48,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781087939] [2021-07-13 20:39:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:48,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:48,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781087939] [2021-07-13 20:39:48,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781087939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:48,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798836122] [2021-07-13 20:39:48,421 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 [2021-07-13 20:39:48,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:48,819 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-13 20:39:48,942 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_232], 3=[v_prenex_233, v_prenex_234]} [2021-07-13 20:39:48,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:48,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,959 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 [2021-07-13 20:39:48,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:48,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:48,971 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 [2021-07-13 20:39:48,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,112 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:39:49,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,125 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 26 treesize of output 24 [2021-07-13 20:39:49,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,137 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:49,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:49,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,268 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:39:49,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,282 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:39:49,282 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 [2021-07-13 20:39:49,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,295 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 30 treesize of output 26 [2021-07-13 20:39:49,298 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,412 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:39:49,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,425 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 [2021-07-13 20:39:49,428 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:49,439 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:39:49,439 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 [2021-07-13 20:39:49,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:49,541 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-13 20:39:49,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:49,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:49,547 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:361, output treesize:194 [2021-07-13 20:39:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:49,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798836122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:49,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:49,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:39:49,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157956830] [2021-07-13 20:39:49,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:49,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:49,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:49,743 INFO L87 Difference]: Start difference. First operand 1816 states and 6203 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) [2021-07-13 20:39:49,996 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-07-13 20:39:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:50,451 INFO L93 Difference]: Finished difference Result 2323 states and 7788 transitions. [2021-07-13 20:39:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:39:50,451 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 [2021-07-13 20:39:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:50,456 INFO L225 Difference]: With dead ends: 2323 [2021-07-13 20:39:50,456 INFO L226 Difference]: Without dead ends: 2298 [2021-07-13 20:39:50,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1268.2ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:39:50,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-13 20:39:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1804. [2021-07-13 20:39:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4170826400443706) internal successors, (6161), 1803 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6161 transitions. [2021-07-13 20:39:50,483 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6161 transitions. Word has length 26 [2021-07-13 20:39:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:50,484 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6161 transitions. [2021-07-13 20:39:50,484 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) [2021-07-13 20:39:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6161 transitions. [2021-07-13 20:39:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:50,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:50,487 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] [2021-07-13 20:39:50,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:50,687 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:50,687 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-07-13 20:39:50,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:50,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099551107] [2021-07-13 20:39:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:50,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:50,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099551107] [2021-07-13 20:39:50,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099551107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:50,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394475979] [2021-07-13 20:39:50,977 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 [2021-07-13 20:39:51,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:51,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:51,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:39:51,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:51,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:51,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,382 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 21 treesize of output 13 [2021-07-13 20:39:51,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,388 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 28 treesize of output 16 [2021-07-13 20:39:51,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:51,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:51,400 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:51,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:51,412 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:51,417 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,423 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 [2021-07-13 20:39:51,424 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,429 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 36 treesize of output 19 [2021-07-13 20:39:51,430 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,434 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 33 treesize of output 19 [2021-07-13 20:39:51,435 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,440 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 31 treesize of output 19 [2021-07-13 20:39:51,441 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:51,446 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:51,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:51,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:51,450 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:51,524 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-13 20:39:51,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:51,526 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-13 20:39:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:51,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394475979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:51,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:51,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:51,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277004584] [2021-07-13 20:39:51,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:51,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:51,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:51,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:51,593 INFO L87 Difference]: Start difference. First operand 1804 states and 6161 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) [2021-07-13 20:39:52,290 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-13 20:39:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:52,496 INFO L93 Difference]: Finished difference Result 2327 states and 7784 transitions. [2021-07-13 20:39:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:39:52,496 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 [2021-07-13 20:39:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:52,501 INFO L225 Difference]: With dead ends: 2327 [2021-07-13 20:39:52,501 INFO L226 Difference]: Without dead ends: 2312 [2021-07-13 20:39:52,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1069.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:39:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-07-13 20:39:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1849. [2021-07-13 20:39:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-07-13 20:39:52,530 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-07-13 20:39:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:52,530 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-07-13 20:39:52,530 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) [2021-07-13 20:39:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-07-13 20:39:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:52,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:52,533 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] [2021-07-13 20:39:52,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2956,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:52,733 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-07-13 20:39:52,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:52,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166509638] [2021-07-13 20:39:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:53,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:53,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166509638] [2021-07-13 20:39:53,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166509638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:53,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761699752] [2021-07-13 20:39:53,053 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 [2021-07-13 20:39:53,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:53,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:53,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:39:53,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:53,435 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:53,435 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 36 treesize of output 22 [2021-07-13 20:39:53,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,445 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:53,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,454 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:53,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,463 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:53,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,472 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:53,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:53,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,497 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:53,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,498 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,506 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:53,506 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 19 [2021-07-13 20:39:53,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,515 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:39:53,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,515 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:53,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,533 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,550 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:53,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,552 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:53,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,571 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,590 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:53,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,591 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,610 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,613 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,630 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:53,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,632 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,647 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:53,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:53,651 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:53,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:53,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:53,765 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:247 [2021-07-13 20:39:53,937 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-13 20:39:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:54,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761699752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:54,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:54,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:39:54,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411740840] [2021-07-13 20:39:54,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:54,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:54,047 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 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) [2021-07-13 20:39:54,781 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-07-13 20:39:54,966 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-07-13 20:39:55,100 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-13 20:39:55,266 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-07-13 20:39:55,691 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-07-13 20:39:55,870 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-07-13 20:39:56,123 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-07-13 20:39:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:56,158 INFO L93 Difference]: Finished difference Result 2674 states and 8821 transitions. [2021-07-13 20:39:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:39:56,158 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 [2021-07-13 20:39:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:56,162 INFO L225 Difference]: With dead ends: 2674 [2021-07-13 20:39:56,162 INFO L226 Difference]: Without dead ends: 2644 [2021-07-13 20:39:56,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2403.9ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:39:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-07-13 20:39:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1849. [2021-07-13 20:39:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-07-13 20:39:56,189 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-07-13 20:39:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:56,189 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-07-13 20:39:56,189 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) [2021-07-13 20:39:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-07-13 20:39:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:56,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:56,192 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] [2021-07-13 20:39:56,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-07-13 20:39:56,393 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-07-13 20:39:56,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:56,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136942980] [2021-07-13 20:39:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:56,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:56,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136942980] [2021-07-13 20:39:56,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136942980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:56,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208473495] [2021-07-13 20:39:56,703 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 [2021-07-13 20:39:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:39:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:57,022 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[A, v_prenex_240, v_prenex_236]} [2021-07-13 20:39:57,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,034 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 33 treesize of output 19 [2021-07-13 20:39:57,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:57,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,180 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-13 20:39:57,180 INFO L628 ElimStorePlain]: treesize reduction 158, result has 46.4 percent of original size [2021-07-13 20:39:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:57,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:57,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,236 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 [2021-07-13 20:39:57,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:57,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:57,284 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 [2021-07-13 20:39:57,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:57,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:57,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:57,326 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:335, output treesize:51 [2021-07-13 20:39:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:57,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208473495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:57,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:57,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:57,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772887867] [2021-07-13 20:39:57,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:57,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:57,398 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 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) [2021-07-13 20:39:58,075 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-07-13 20:39:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:58,182 INFO L93 Difference]: Finished difference Result 2432 states and 8093 transitions. [2021-07-13 20:39:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:39:58,182 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 [2021-07-13 20:39:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:58,187 INFO L225 Difference]: With dead ends: 2432 [2021-07-13 20:39:58,187 INFO L226 Difference]: Without dead ends: 2402 [2021-07-13 20:39:58,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1087.4ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:39:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-07-13 20:39:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1851. [2021-07-13 20:39:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1850 states have (on average 3.4135135135135135) internal successors, (6315), 1850 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 6315 transitions. [2021-07-13 20:39:58,215 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 6315 transitions. Word has length 26 [2021-07-13 20:39:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:58,216 INFO L482 AbstractCegarLoop]: Abstraction has 1851 states and 6315 transitions. [2021-07-13 20:39:58,216 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) [2021-07-13 20:39:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 6315 transitions. [2021-07-13 20:39:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:58,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:58,219 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] [2021-07-13 20:39:58,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:58,419 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:58,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-07-13 20:39:58,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:58,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624477823] [2021-07-13 20:39:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:58,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:58,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624477823] [2021-07-13 20:39:58,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624477823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:58,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751176999] [2021-07-13 20:39:58,762 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 [2021-07-13 20:39:58,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:58,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:39:58,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:58,980 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-07-13 20:39:59,147 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-07-13 20:39:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,363 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:59,363 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 26 treesize of output 28 [2021-07-13 20:39:59,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,385 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:59,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,545 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:39:59,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,568 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:39:59,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 33 [2021-07-13 20:39:59,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:59,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 37 [2021-07-13 20:39:59,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,886 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-07-13 20:39:59,887 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-07-13 20:39:59,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,906 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:39:59,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:59,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:59,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:59,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:39:59,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,063 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:40:00,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:00,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:00,080 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 32 [2021-07-13 20:40:00,087 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:00,102 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:00,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:00,103 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:00,382 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-07-13 20:40:00,383 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-07-13 20:40:00,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:00,399 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:385, output treesize:286 [2021-07-13 20:40:00,605 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-13 20:40:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:00,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751176999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:00,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:00,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:40:00,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907390135] [2021-07-13 20:40:00,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:00,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:00,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:00,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:00,702 INFO L87 Difference]: Start difference. First operand 1851 states and 6315 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) [2021-07-13 20:40:01,011 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-13 20:40:01,282 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-07-13 20:40:01,790 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-07-13 20:40:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:01,828 INFO L93 Difference]: Finished difference Result 2442 states and 8174 transitions. [2021-07-13 20:40:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:40:01,829 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 [2021-07-13 20:40:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:01,833 INFO L225 Difference]: With dead ends: 2442 [2021-07-13 20:40:01,834 INFO L226 Difference]: Without dead ends: 2427 [2021-07-13 20:40:01,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1629.1ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:40:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-07-13 20:40:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1869. [2021-07-13 20:40:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.4095289079229123) internal successors, (6369), 1868 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6369 transitions. [2021-07-13 20:40:01,862 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6369 transitions. Word has length 26 [2021-07-13 20:40:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:01,862 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6369 transitions. [2021-07-13 20:40:01,862 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) [2021-07-13 20:40:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6369 transitions. [2021-07-13 20:40:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:01,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:01,865 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] [2021-07-13 20:40:02,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:02,066 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-07-13 20:40:02,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:02,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876900037] [2021-07-13 20:40:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:02,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:02,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876900037] [2021-07-13 20:40:02,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876900037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:02,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47844786] [2021-07-13 20:40:02,330 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 [2021-07-13 20:40:02,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:02,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:02,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:40:02,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:02,775 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:40:03,026 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-13 20:40:03,138 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_256, v_prenex_257], 2=[A, v_prenex_258]} [2021-07-13 20:40:03,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,146 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 [2021-07-13 20:40:03,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,154 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 [2021-07-13 20:40:03,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,294 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 20:40:03,295 INFO L628 ElimStorePlain]: treesize reduction 130, result has 54.7 percent of original size [2021-07-13 20:40:03,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,299 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 [2021-07-13 20:40:03,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:03,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:03,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:03,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:03,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:03,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:03,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:03,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:03,414 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 28 treesize of output 16 [2021-07-13 20:40:03,415 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:03,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:03,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:40:03,457 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:317, output treesize:51 [2021-07-13 20:40:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:03,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47844786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:03,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:03,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:40:03,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938989736] [2021-07-13 20:40:03,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:40:03,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:03,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:40:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:40:03,514 INFO L87 Difference]: Start difference. First operand 1869 states and 6369 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) [2021-07-13 20:40:04,140 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:40:04,384 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-07-13 20:40:04,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:04,490 INFO L93 Difference]: Finished difference Result 1982 states and 6684 transitions. [2021-07-13 20:40:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:40:04,490 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 [2021-07-13 20:40:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:04,494 INFO L225 Difference]: With dead ends: 1982 [2021-07-13 20:40:04,494 INFO L226 Difference]: Without dead ends: 1967 [2021-07-13 20:40:04,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1502.8ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:40:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-13 20:40:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1890. [2021-07-13 20:40:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4060349391212283) internal successors, (6434), 1889 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6434 transitions. [2021-07-13 20:40:04,520 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6434 transitions. Word has length 26 [2021-07-13 20:40:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:04,520 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6434 transitions. [2021-07-13 20:40:04,520 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) [2021-07-13 20:40:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6434 transitions. [2021-07-13 20:40:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:04,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:04,523 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] [2021-07-13 20:40:04,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-07-13 20:40:04,724 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:04,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-07-13 20:40:04,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:04,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866442115] [2021-07-13 20:40:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:04,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:04,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866442115] [2021-07-13 20:40:04,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866442115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:04,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356031298] [2021-07-13 20:40:04,980 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 [2021-07-13 20:40:05,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:05,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:05,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:40:05,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:05,444 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:40:05,496 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_270, v_prenex_264, v_prenex_266], 3=[v_prenex_271, v_prenex_273, v_prenex_265, v_prenex_268]} [2021-07-13 20:40:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:05,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,510 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 33 treesize of output 27 [2021-07-13 20:40:05,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:05,633 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-13 20:40:05,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:05,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,646 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 [2021-07-13 20:40:05,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:05,771 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:40:05,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:05,785 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:05,785 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 [2021-07-13 20:40:05,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:05,904 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:40:05,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:05,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:05,917 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 [2021-07-13 20:40:05,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,032 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:40:06,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:06,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:06,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,045 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 [2021-07-13 20:40:06,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,158 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:40:06,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:06,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,170 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 [2021-07-13 20:40:06,174 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,290 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-07-13 20:40:06,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:06,302 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:40:06,302 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 [2021-07-13 20:40:06,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:06,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:06,413 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:40:06,413 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 [2021-07-13 20:40:06,414 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:06,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:06,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:06,525 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:194 [2021-07-13 20:40:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:06,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356031298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:06,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:06,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:40:06,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043123914] [2021-07-13 20:40:06,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:06,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:06,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:06,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:06,735 INFO L87 Difference]: Start difference. First operand 1890 states and 6434 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) 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) [2021-07-13 20:40:07,539 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:40:07,937 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-07-13 20:40:08,163 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-07-13 20:40:08,408 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-07-13 20:40:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:08,543 INFO L93 Difference]: Finished difference Result 2744 states and 9064 transitions. [2021-07-13 20:40:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:40:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) 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 [2021-07-13 20:40:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:08,548 INFO L225 Difference]: With dead ends: 2744 [2021-07-13 20:40:08,548 INFO L226 Difference]: Without dead ends: 2714 [2021-07-13 20:40:08,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2062.4ms TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:40:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-07-13 20:40:08,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1888. [2021-07-13 20:40:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.408055113937467) internal successors, (6431), 1887 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6431 transitions. [2021-07-13 20:40:08,580 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6431 transitions. Word has length 26 [2021-07-13 20:40:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:08,580 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6431 transitions. [2021-07-13 20:40:08,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) 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) [2021-07-13 20:40:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6431 transitions. [2021-07-13 20:40:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:08,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:08,583 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] [2021-07-13 20:40:08,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:08,784 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:08,784 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-07-13 20:40:08,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:08,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074712449] [2021-07-13 20:40:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:09,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:09,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074712449] [2021-07-13 20:40:09,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074712449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:09,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706638088] [2021-07-13 20:40:09,129 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 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 [2021-07-13 20:40:09,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:09,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:09,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:40:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:09,569 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-13 20:40:09,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:09,735 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 [2021-07-13 20:40:09,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:09,750 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 [2021-07-13 20:40:09,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,877 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-13 20:40:09,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:09,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:09,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:09,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:09,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:09,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:10,022 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:40:10,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:10,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:10,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:10,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:10,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:10,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:10,047 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:10,047 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 21 treesize of output 17 [2021-07-13 20:40:10,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:10,157 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:40:10,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:10,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:10,170 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 [2021-07-13 20:40:10,172 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:10,182 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:10,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:10,183 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:10,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:10,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:10,288 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-07-13 20:40:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:10,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706638088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:10,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:10,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:40:10,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767221689] [2021-07-13 20:40:10,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:10,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:10,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:10,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:10,484 INFO L87 Difference]: Start difference. First operand 1888 states and 6431 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) [2021-07-13 20:40:11,303 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 20:40:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:11,356 INFO L93 Difference]: Finished difference Result 2422 states and 8105 transitions. [2021-07-13 20:40:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:40:11,356 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 [2021-07-13 20:40:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:11,362 INFO L225 Difference]: With dead ends: 2422 [2021-07-13 20:40:11,362 INFO L226 Difference]: Without dead ends: 2397 [2021-07-13 20:40:11,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1345.0ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:40:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-13 20:40:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1888. [2021-07-13 20:40:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-07-13 20:40:11,395 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-07-13 20:40:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:11,395 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-07-13 20:40:11,395 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) [2021-07-13 20:40:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-07-13 20:40:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:11,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:11,398 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] [2021-07-13 20:40:11,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3141 [2021-07-13 20:40:11,600 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-07-13 20:40:11,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:11,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088076568] [2021-07-13 20:40:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:11,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:11,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088076568] [2021-07-13 20:40:11,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088076568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:11,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074870761] [2021-07-13 20:40:11,919 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 [2021-07-13 20:40:11,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:40:11,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:11,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:11,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,140 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:12,141 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 [2021-07-13 20:40:12,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,150 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:12,150 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 [2021-07-13 20:40:12,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:12,159 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 [2021-07-13 20:40:12,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,171 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 [2021-07-13 20:40:12,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:12,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:12,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:12,208 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,218 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 [2021-07-13 20:40:12,222 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,232 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 [2021-07-13 20:40:12,234 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,242 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:12,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:12,243 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,252 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:12,252 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 [2021-07-13 20:40:12,253 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:12,275 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 [2021-07-13 20:40:12,276 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,291 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:12,292 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 [2021-07-13 20:40:12,294 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,309 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:12,309 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 [2021-07-13 20:40:12,311 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:12,325 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 [2021-07-13 20:40:12,327 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:12,335 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:40:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:12,336 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:12,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:12,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:12,412 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-13 20:40:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:12,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074870761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:12,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:12,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:40:12,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987109921] [2021-07-13 20:40:12,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:12,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:12,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:12,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:12,630 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 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) [2021-07-13 20:40:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:13,401 INFO L93 Difference]: Finished difference Result 2430 states and 8144 transitions. [2021-07-13 20:40:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:40:13,401 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 [2021-07-13 20:40:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:13,406 INFO L225 Difference]: With dead ends: 2430 [2021-07-13 20:40:13,406 INFO L226 Difference]: Without dead ends: 2415 [2021-07-13 20:40:13,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1080.9ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:40:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-13 20:40:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1888. [2021-07-13 20:40:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-07-13 20:40:13,435 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-07-13 20:40:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:13,435 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-07-13 20:40:13,435 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) [2021-07-13 20:40:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-07-13 20:40:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:13,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:13,438 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] [2021-07-13 20:40:13,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3174 [2021-07-13 20:40:13,638 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:13,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-07-13 20:40:13,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:13,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599470172] [2021-07-13 20:40:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:14,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:14,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599470172] [2021-07-13 20:40:14,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599470172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:14,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377033325] [2021-07-13 20:40:14,105 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 [2021-07-13 20:40:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:14,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,676 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 [2021-07-13 20:40:14,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,687 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 [2021-07-13 20:40:14,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,697 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 19 [2021-07-13 20:40:14,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:14,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,717 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 [2021-07-13 20:40:14,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,727 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 [2021-07-13 20:40:14,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,737 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 35 treesize of output 19 [2021-07-13 20:40:14,738 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,746 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 [2021-07-13 20:40:14,747 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,756 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 34 treesize of output 16 [2021-07-13 20:40:14,756 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,765 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 [2021-07-13 20:40:14,766 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,775 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 [2021-07-13 20:40:14,776 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,785 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 [2021-07-13 20:40:14,786 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,794 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 32 treesize of output 16 [2021-07-13 20:40:14,794 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,802 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 [2021-07-13 20:40:14,803 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:14,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:14,807 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 [2021-07-13 20:40:14,808 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:14,839 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-13 20:40:14,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:40:14,840 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:40:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:14,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377033325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:14,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:14,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:40:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812741180] [2021-07-13 20:40:14,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:14,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:14,887 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) 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) [2021-07-13 20:40:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:15,586 INFO L93 Difference]: Finished difference Result 2457 states and 7898 transitions. [2021-07-13 20:40:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:40:15,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) 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 [2021-07-13 20:40:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:15,591 INFO L225 Difference]: With dead ends: 2457 [2021-07-13 20:40:15,591 INFO L226 Difference]: Without dead ends: 2420 [2021-07-13 20:40:15,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1031.0ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:40:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-07-13 20:40:15,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1914. [2021-07-13 20:40:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.410350235232619) internal successors, (6524), 1913 states have internal predecessors, (6524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6524 transitions. [2021-07-13 20:40:15,619 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6524 transitions. Word has length 26 [2021-07-13 20:40:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:15,619 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6524 transitions. [2021-07-13 20:40:15,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) 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) [2021-07-13 20:40:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6524 transitions. [2021-07-13 20:40:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:15,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:15,622 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] [2021-07-13 20:40:15,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3191 [2021-07-13 20:40:15,822 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:15,823 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-07-13 20:40:15,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:15,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406769625] [2021-07-13 20:40:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:16,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:16,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406769625] [2021-07-13 20:40:16,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406769625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:16,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716316201] [2021-07-13 20:40:16,140 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 [2021-07-13 20:40:16,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:16,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:16,418 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-13 20:40:16,483 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_283, v_prenex_285], 6=[A, v_prenex_287]} [2021-07-13 20:40:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:16,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:16,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:16,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:40:16,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:16,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:16,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:16,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,605 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-13 20:40:16,605 INFO L628 ElimStorePlain]: treesize reduction 166, result has 44.9 percent of original size [2021-07-13 20:40:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:16,609 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 15 treesize of output 7 [2021-07-13 20:40:16,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:16,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:16,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:16,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:16,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:16,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:16,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:16,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:16,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:40:16,719 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-07-13 20:40:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:16,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716316201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:16,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:16,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:40:16,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933297580] [2021-07-13 20:40:16,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:40:16,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:16,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:40:16,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:40:16,764 INFO L87 Difference]: Start difference. First operand 1914 states and 6524 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) [2021-07-13 20:40:17,625 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-13 20:40:17,787 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-07-13 20:40:17,936 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-07-13 20:40:18,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:18,039 INFO L93 Difference]: Finished difference Result 2392 states and 7936 transitions. [2021-07-13 20:40:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:40:18,039 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 [2021-07-13 20:40:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:18,044 INFO L225 Difference]: With dead ends: 2392 [2021-07-13 20:40:18,044 INFO L226 Difference]: Without dead ends: 2346 [2021-07-13 20:40:18,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1475.0ms TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:40:18,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-13 20:40:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1910. [2021-07-13 20:40:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 3.4038763750654795) internal successors, (6498), 1909 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6498 transitions. [2021-07-13 20:40:18,081 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6498 transitions. Word has length 26 [2021-07-13 20:40:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:18,081 INFO L482 AbstractCegarLoop]: Abstraction has 1910 states and 6498 transitions. [2021-07-13 20:40:18,081 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) [2021-07-13 20:40:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6498 transitions. [2021-07-13 20:40:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:18,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:18,084 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] [2021-07-13 20:40:18,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3305 [2021-07-13 20:40:18,284 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-07-13 20:40:18,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:18,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949350714] [2021-07-13 20:40:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:18,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:18,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949350714] [2021-07-13 20:40:18,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949350714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:18,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985412274] [2021-07-13 20:40:18,670 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 [2021-07-13 20:40:18,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:18,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:18,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:19,128 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:40:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,441 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:40:19,441 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 [2021-07-13 20:40:19,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,473 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:40:19,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:19,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:19,854 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-07-13 20:40:19,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:19,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,891 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:19,892 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 [2021-07-13 20:40:19,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:19,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:19,921 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:40:19,921 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:40:19,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:20,287 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-13 20:40:20,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:20,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:20,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:20,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:20,345 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:20,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:20,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:20,670 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-07-13 20:40:20,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:20,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:20,706 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:20,706 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 [2021-07-13 20:40:20,708 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:20,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:20,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:20,735 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:40:20,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:20,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,061 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-13 20:40:21,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:21,092 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 [2021-07-13 20:40:21,106 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,137 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:21,137 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 [2021-07-13 20:40:21,140 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:21,967 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 124 [2021-07-13 20:40:21,967 INFO L628 ElimStorePlain]: treesize reduction 40, result has 93.4 percent of original size [2021-07-13 20:40:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,000 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:22,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:22,004 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:22,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,019 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:40:22,019 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 [2021-07-13 20:40:22,020 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:22,246 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:40:22,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,280 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:40:22,280 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 28 [2021-07-13 20:40:22,282 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:22,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,313 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:40:22,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:22,318 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:22,752 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2021-07-13 20:40:22,752 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.7 percent of original size [2021-07-13 20:40:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,777 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:40:22,778 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 28 treesize of output 26 [2021-07-13 20:40:22,780 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:22,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:22,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:22,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:22,807 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:22,982 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:40:22,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:22,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-13 20:40:22,994 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:348 [2021-07-13 20:40:23,160 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-07-13 20:40:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:23,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985412274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:23,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:23,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:40:23,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896073823] [2021-07-13 20:40:23,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:23,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:23,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:23,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:23,187 INFO L87 Difference]: Start difference. First operand 1910 states and 6498 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-07-13 20:40:24,171 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:40:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:24,421 INFO L93 Difference]: Finished difference Result 2172 states and 7282 transitions. [2021-07-13 20:40:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:40:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-07-13 20:40:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:24,425 INFO L225 Difference]: With dead ends: 2172 [2021-07-13 20:40:24,425 INFO L226 Difference]: Without dead ends: 2157 [2021-07-13 20:40:24,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1750.8ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:40:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-07-13 20:40:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1922. [2021-07-13 20:40:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.407600208224883) internal successors, (6546), 1921 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6546 transitions. [2021-07-13 20:40:24,449 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6546 transitions. Word has length 26 [2021-07-13 20:40:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:24,449 INFO L482 AbstractCegarLoop]: Abstraction has 1922 states and 6546 transitions. [2021-07-13 20:40:24,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-07-13 20:40:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6546 transitions. [2021-07-13 20:40:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:24,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:24,452 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] [2021-07-13 20:40:24,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-07-13 20:40:24,653 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-07-13 20:40:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:24,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752166809] [2021-07-13 20:40:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:25,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:25,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752166809] [2021-07-13 20:40:25,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752166809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:25,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634423662] [2021-07-13 20:40:25,080 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 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 [2021-07-13 20:40:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:25,461 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 20:40:25,494 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_307, v_prenex_309]} [2021-07-13 20:40:25,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:25,498 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 [2021-07-13 20:40:25,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:25,609 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:40:25,609 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:40:25,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:25,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:25,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:25,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:25,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:25,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:25,620 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 21 treesize of output 13 [2021-07-13 20:40:25,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:25,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:25,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:25,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:25,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:25,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:40:25,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:40:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:25,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634423662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:25,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:25,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:25,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800293958] [2021-07-13 20:40:25,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:25,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:25,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:25,773 INFO L87 Difference]: Start difference. First operand 1922 states and 6546 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) [2021-07-13 20:40:26,351 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 20:40:26,700 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-13 20:40:26,865 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-07-13 20:40:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:27,040 INFO L93 Difference]: Finished difference Result 2493 states and 8257 transitions. [2021-07-13 20:40:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:40:27,040 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 [2021-07-13 20:40:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:27,045 INFO L225 Difference]: With dead ends: 2493 [2021-07-13 20:40:27,045 INFO L226 Difference]: Without dead ends: 2478 [2021-07-13 20:40:27,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1606.5ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:40:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-07-13 20:40:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1933. [2021-07-13 20:40:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.4078674948240164) internal successors, (6584), 1932 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6584 transitions. [2021-07-13 20:40:27,075 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6584 transitions. Word has length 26 [2021-07-13 20:40:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:27,075 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6584 transitions. [2021-07-13 20:40:27,075 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) [2021-07-13 20:40:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6584 transitions. [2021-07-13 20:40:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:27,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:27,078 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] [2021-07-13 20:40:27,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:27,278 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:27,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-07-13 20:40:27,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:27,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832698997] [2021-07-13 20:40:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:27,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:27,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832698997] [2021-07-13 20:40:27,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832698997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:27,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030204276] [2021-07-13 20:40:27,582 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 [2021-07-13 20:40:27,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:27,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:27,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:28,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,133 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 [2021-07-13 20:40:28,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,140 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 [2021-07-13 20:40:28,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,148 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 [2021-07-13 20:40:28,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,155 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 [2021-07-13 20:40:28,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,163 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 [2021-07-13 20:40:28,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:28,171 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,178 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 [2021-07-13 20:40:28,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,186 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 [2021-07-13 20:40:28,187 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,193 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 [2021-07-13 20:40:28,194 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,201 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 [2021-07-13 20:40:28,202 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,221 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 [2021-07-13 20:40:28,222 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:28,229 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,235 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 [2021-07-13 20:40:28,236 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,242 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 28 treesize of output 13 [2021-07-13 20:40:28,242 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:28,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:28,246 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 [2021-07-13 20:40:28,247 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:28,273 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-13 20:40:28,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:40:28,274 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:40:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:28,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030204276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:28,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:28,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:40:28,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551204434] [2021-07-13 20:40:28,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:28,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:28,304 INFO L87 Difference]: Start difference. First operand 1933 states and 6584 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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) [2021-07-13 20:40:28,779 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-13 20:40:29,119 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-13 20:40:29,622 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 20:40:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:29,984 INFO L93 Difference]: Finished difference Result 3085 states and 9838 transitions. [2021-07-13 20:40:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:40:29,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 [2021-07-13 20:40:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:29,990 INFO L225 Difference]: With dead ends: 3085 [2021-07-13 20:40:29,990 INFO L226 Difference]: Without dead ends: 3042 [2021-07-13 20:40:29,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1756.7ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:40:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-07-13 20:40:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2025. [2021-07-13 20:40:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.4234189723320156) internal successors, (6929), 2024 states have internal predecessors, (6929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6929 transitions. [2021-07-13 20:40:30,024 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6929 transitions. Word has length 26 [2021-07-13 20:40:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:30,024 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 6929 transitions. [2021-07-13 20:40:30,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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) [2021-07-13 20:40:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6929 transitions. [2021-07-13 20:40:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:30,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:30,027 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] [2021-07-13 20:40:30,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-07-13 20:40:30,227 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-07-13 20:40:30,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:30,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126955335] [2021-07-13 20:40:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:30,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:30,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126955335] [2021-07-13 20:40:30,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126955335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:30,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091792641] [2021-07-13 20:40:30,667 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 [2021-07-13 20:40:30,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:30,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:30,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:40:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:31,203 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:40:31,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:31,863 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:31,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:31,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,044 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-13 20:40:32,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:32,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,260 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-13 20:40:32,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,287 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:32,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,448 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-07-13 20:40:32,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,469 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:40:32,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,630 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-07-13 20:40:32,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,653 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:40:32,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:32,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,810 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-13 20:40:32,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:32,835 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:32,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:32,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:32,989 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 20:40:32,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:32,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:33,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:33,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:33,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:33,159 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:40:33,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:33,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:33,182 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:40:33,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:33,184 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:33,326 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:40:33,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:33,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:33,350 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:513 [2021-07-13 20:40:33,806 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-07-13 20:40:34,176 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-07-13 20:40:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:34,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091792641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:34,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:34,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:40:34,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673218678] [2021-07-13 20:40:34,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:40:34,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:34,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:40:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:40:34,287 INFO L87 Difference]: Start difference. First operand 2025 states and 6929 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) [2021-07-13 20:40:34,721 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 20:40:35,239 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-07-13 20:40:35,640 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-07-13 20:40:35,999 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-07-13 20:40:36,657 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-07-13 20:40:36,916 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-07-13 20:40:37,427 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 120 [2021-07-13 20:40:37,938 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2021-07-13 20:40:38,444 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2021-07-13 20:40:38,999 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 138 [2021-07-13 20:40:39,417 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-07-13 20:40:39,975 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2021-07-13 20:40:40,337 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 84 [2021-07-13 20:40:40,828 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-07-13 20:40:41,323 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-07-13 20:40:41,623 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-07-13 20:40:42,275 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 91 [2021-07-13 20:40:42,606 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-07-13 20:40:43,068 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 57 [2021-07-13 20:40:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:43,168 INFO L93 Difference]: Finished difference Result 2870 states and 9420 transitions. [2021-07-13 20:40:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:40:43,168 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 [2021-07-13 20:40:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:43,173 INFO L225 Difference]: With dead ends: 2870 [2021-07-13 20:40:43,173 INFO L226 Difference]: Without dead ends: 2855 [2021-07-13 20:40:43,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 9382.1ms TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:40:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-07-13 20:40:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2033. [2021-07-13 20:40:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4247047244094486) internal successors, (6959), 2032 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6959 transitions. [2021-07-13 20:40:43,205 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6959 transitions. Word has length 26 [2021-07-13 20:40:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:43,206 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 6959 transitions. [2021-07-13 20:40:43,206 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) [2021-07-13 20:40:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6959 transitions. [2021-07-13 20:40:43,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:43,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:43,208 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] [2021-07-13 20:40:43,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3503,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:43,410 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash 719147274, now seen corresponding path program 51 times [2021-07-13 20:40:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:43,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428642762] [2021-07-13 20:40:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:43,702 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-13 20:40:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:43,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:43,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428642762] [2021-07-13 20:40:43,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428642762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:43,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378888235] [2021-07-13 20:40:43,882 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 [2021-07-13 20:40:43,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:40:43,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:43,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:40:43,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:44,221 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:40:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,278 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 [2021-07-13 20:40:44,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,398 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:40:44,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,413 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:44,413 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 [2021-07-13 20:40:44,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,529 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:40:44,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,542 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:44,542 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 [2021-07-13 20:40:44,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,655 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:40:44,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,668 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:40:44,669 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 28 treesize of output 20 [2021-07-13 20:40:44,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,778 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:40:44,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,792 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 [2021-07-13 20:40:44,795 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:44,902 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-13 20:40:44,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:44,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:44,914 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 [2021-07-13 20:40:44,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:45,034 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:40:45,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:45,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:45,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:45,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:45,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:45,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:45,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:45,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:45,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:45,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:45,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:45,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:40:45,259 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:40:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:45,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378888235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:45,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:45,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:40:45,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785756204] [2021-07-13 20:40:45,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:40:45,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:45,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:40:45,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:40:45,443 INFO L87 Difference]: Start difference. First operand 2033 states and 6959 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) [2021-07-13 20:40:45,838 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-13 20:40:46,302 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-07-13 20:40:46,803 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 20:40:46,957 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-07-13 20:40:47,162 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-13 20:40:47,343 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-07-13 20:40:47,713 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:40:47,914 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 20:40:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:48,021 INFO L93 Difference]: Finished difference Result 2982 states and 9848 transitions. [2021-07-13 20:40:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:40:48,021 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 [2021-07-13 20:40:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:48,027 INFO L225 Difference]: With dead ends: 2982 [2021-07-13 20:40:48,027 INFO L226 Difference]: Without dead ends: 2967 [2021-07-13 20:40:48,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2832.5ms TimeCoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:40:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-07-13 20:40:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2028. [2021-07-13 20:40:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 3.4257523433645782) internal successors, (6944), 2027 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 6944 transitions. [2021-07-13 20:40:48,063 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 6944 transitions. Word has length 26 [2021-07-13 20:40:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:48,063 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 6944 transitions. [2021-07-13 20:40:48,063 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) [2021-07-13 20:40:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 6944 transitions. [2021-07-13 20:40:48,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:48,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:48,066 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] [2021-07-13 20:40:48,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3569 [2021-07-13 20:40:48,267 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:48,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-07-13 20:40:48,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:48,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371118277] [2021-07-13 20:40:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:48,454 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-07-13 20:40:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:48,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:48,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371118277] [2021-07-13 20:40:48,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371118277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:48,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164370942] [2021-07-13 20:40:48,641 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 [2021-07-13 20:40:48,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:40:48,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:48,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:40:48,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:49,108 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:40:49,477 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-07-13 20:40:49,711 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2021-07-13 20:40:49,954 INFO L446 ElimStorePlain]: Different costs {20=[v_prenex_385], 27=[A]} [2021-07-13 20:40:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,965 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 [2021-07-13 20:40:49,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:49,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:49,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:49,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:40:49,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:50,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:50,001 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 [2021-07-13 20:40:50,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,135 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-13 20:40:50,136 INFO L628 ElimStorePlain]: treesize reduction 114, result has 56.3 percent of original size [2021-07-13 20:40:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,141 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 [2021-07-13 20:40:50,142 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:50,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:40:50,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:40:50,148 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:50,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:50,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:40:50,197 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:399, output treesize:89 [2021-07-13 20:40:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:50,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164370942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:50,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:50,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-13 20:40:50,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459191857] [2021-07-13 20:40:50,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:40:50,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:50,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:40:50,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:40:50,278 INFO L87 Difference]: Start difference. First operand 2028 states and 6944 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-07-13 20:40:51,094 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:40:51,541 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-07-13 20:40:51,753 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:40:52,115 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 71 [2021-07-13 20:40:52,502 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-07-13 20:40:52,803 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-07-13 20:40:53,217 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2021-07-13 20:40:53,602 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 125 [2021-07-13 20:40:53,854 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 47 [2021-07-13 20:40:54,244 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-07-13 20:40:54,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:54,401 INFO L93 Difference]: Finished difference Result 3633 states and 11658 transitions. [2021-07-13 20:40:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:40:54,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 [2021-07-13 20:40:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:54,408 INFO L225 Difference]: With dead ends: 3633 [2021-07-13 20:40:54,409 INFO L226 Difference]: Without dead ends: 3546 [2021-07-13 20:40:54,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 4588.9ms TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:40:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-07-13 20:40:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2151. [2021-07-13 20:40:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.4288372093023254) internal successors, (7372), 2150 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7372 transitions. [2021-07-13 20:40:54,448 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7372 transitions. Word has length 26 [2021-07-13 20:40:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:54,448 INFO L482 AbstractCegarLoop]: Abstraction has 2151 states and 7372 transitions. [2021-07-13 20:40:54,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-07-13 20:40:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7372 transitions. [2021-07-13 20:40:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:40:54,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:54,452 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] [2021-07-13 20:40:54,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-07-13 20:40:54,652 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-07-13 20:40:54,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:54,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633561185] [2021-07-13 20:40:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:54,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:54,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633561185] [2021-07-13 20:40:54,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633561185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:54,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900016386] [2021-07-13 20:40:54,943 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 [2021-07-13 20:40:54,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:40:54,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:40:54,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:55,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:40:55,248 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 29 treesize of output 53 [2021-07-13 20:40:55,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:40:55,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,296 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:40:55,296 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 44 [2021-07-13 20:40:55,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,338 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:40:55,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 40 [2021-07-13 20:40:55,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,361 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:55,362 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 [2021-07-13 20:40:55,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,391 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:40:55,391 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 27 [2021-07-13 20:40:55,392 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,420 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:40:55,420 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 22 [2021-07-13 20:40:55,421 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,439 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:55,439 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 1 [2021-07-13 20:40:55,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,459 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:55,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:55,459 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,478 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:55,478 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 1 [2021-07-13 20:40:55,479 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,497 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:55,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:40:55,498 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,517 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:55,517 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 [2021-07-13 20:40:55,517 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,536 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:55,536 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 38 treesize of output 1 [2021-07-13 20:40:55,537 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,554 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:40:55,554 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 [2021-07-13 20:40:55,555 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,586 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:40:55,586 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 27 treesize of output 20 [2021-07-13 20:40:55,588 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:40:55,610 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:40:55,611 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 1 [2021-07-13 20:40:55,611 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 20:40:55,617 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:40:55,733 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-07-13 20:40:55,733 INFO L628 ElimStorePlain]: treesize reduction 115, result has 45.2 percent of original size [2021-07-13 20:40:55,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:40:55,735 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:95 [2021-07-13 20:40:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:55,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900016386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:55,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:55,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-13 20:40:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766798992] [2021-07-13 20:40:55,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:40:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:40:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:40:55,952 INFO L87 Difference]: Start difference. First operand 2151 states and 7372 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-07-13 20:40:57,353 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-07-13 20:40:57,750 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:40:57,978 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-07-13 20:40:58,110 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-13 20:40:58,321 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-07-13 20:40:58,632 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-13 20:40:59,069 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-07-13 20:40:59,262 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-07-13 20:40:59,618 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-07-13 20:40:59,796 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:41:00,137 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-07-13 20:41:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:00,269 INFO L93 Difference]: Finished difference Result 3952 states and 12614 transitions. [2021-07-13 20:41:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:41:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 [2021-07-13 20:41:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:00,276 INFO L225 Difference]: With dead ends: 3952 [2021-07-13 20:41:00,276 INFO L226 Difference]: Without dead ends: 3864 [2021-07-13 20:41:00,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 3941.0ms TimeCoverageRelationStatistics Valid=560, Invalid=2980, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:41:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-07-13 20:41:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 2137. [2021-07-13 20:41:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.431179775280899) internal successors, (7329), 2136 states have internal predecessors, (7329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7329 transitions. [2021-07-13 20:41:00,320 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7329 transitions. Word has length 26 [2021-07-13 20:41:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:00,320 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7329 transitions. [2021-07-13 20:41:00,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-07-13 20:41:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7329 transitions. [2021-07-13 20:41:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:00,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:00,323 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] [2021-07-13 20:41:00,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3606 [2021-07-13 20:41:00,525 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:00,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1912368818, now seen corresponding path program 52 times [2021-07-13 20:41:00,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:00,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860236067] [2021-07-13 20:41:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:00,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:00,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860236067] [2021-07-13 20:41:00,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860236067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:00,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852057277] [2021-07-13 20:41:00,967 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 [2021-07-13 20:41:00,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:00,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:00,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:01,342 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:41:01,514 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2021-07-13 20:41:01,593 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_397, v_prenex_398]} [2021-07-13 20:41:01,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:01,597 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 [2021-07-13 20:41:01,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:01,708 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:41:01,708 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-13 20:41:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:01,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:01,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:01,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:01,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:01,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:01,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:01,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:01,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:01,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:01,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:01,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:01,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:01,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:01,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-13 20:41:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:01,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852057277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:01,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:01,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:01,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97354676] [2021-07-13 20:41:01,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:01,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:01,865 INFO L87 Difference]: Start difference. First operand 2137 states and 7329 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) [2021-07-13 20:41:02,775 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-13 20:41:02,947 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-07-13 20:41:03,340 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:41:03,582 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-07-13 20:41:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:03,731 INFO L93 Difference]: Finished difference Result 2703 states and 9088 transitions. [2021-07-13 20:41:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:41:03,732 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 [2021-07-13 20:41:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:03,737 INFO L225 Difference]: With dead ends: 2703 [2021-07-13 20:41:03,737 INFO L226 Difference]: Without dead ends: 2688 [2021-07-13 20:41:03,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2208.9ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:41:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-07-13 20:41:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2150. [2021-07-13 20:41:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 3.4290367612843182) internal successors, (7369), 2149 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 7369 transitions. [2021-07-13 20:41:03,769 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 7369 transitions. Word has length 26 [2021-07-13 20:41:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:03,769 INFO L482 AbstractCegarLoop]: Abstraction has 2150 states and 7369 transitions. [2021-07-13 20:41:03,769 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) [2021-07-13 20:41:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 7369 transitions. [2021-07-13 20:41:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:03,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:03,773 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] [2021-07-13 20:41:03,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3638,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:03,973 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 53 times [2021-07-13 20:41:03,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:03,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106476954] [2021-07-13 20:41:03,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:04,278 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-13 20:41:04,405 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 20:41:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:04,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106476954] [2021-07-13 20:41:04,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106476954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917426811] [2021-07-13 20:41:04,518 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 [2021-07-13 20:41:04,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:04,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:41:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:05,099 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:41:05,201 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_421, v_prenex_410, v_prenex_412], 6=[v_prenex_415, v_prenex_405, v_prenex_418, v_prenex_408]} [2021-07-13 20:41:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,230 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:05,230 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-13 20:41:05,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,597 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-07-13 20:41:05,598 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-07-13 20:41:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,624 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:05,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:05,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,777 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-07-13 20:41:05,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,802 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:41:05,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:05,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:05,947 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-13 20:41:05,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:05,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:05,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:05,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:06,259 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2021-07-13 20:41:06,260 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-07-13 20:41:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:06,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:06,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:06,283 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:06,412 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-13 20:41:06,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:06,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:06,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:41:06,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:06,686 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 [2021-07-13 20:41:06,686 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.0 percent of original size [2021-07-13 20:41:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:06,706 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:06,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:06,708 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:06,827 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-13 20:41:06,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:06,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:06,848 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:41:06,849 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:41:06,850 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:06,966 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:41:06,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:06,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:06,984 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:334 [2021-07-13 20:41:07,197 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 20:41:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:07,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917426811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:07,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:07,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:41:07,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258368520] [2021-07-13 20:41:07,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:41:07,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:41:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:07,300 INFO L87 Difference]: Start difference. First operand 2150 states and 7369 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) [2021-07-13 20:41:07,640 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-13 20:41:07,951 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2021-07-13 20:41:08,416 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-07-13 20:41:08,631 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-13 20:41:08,975 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-07-13 20:41:09,201 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-13 20:41:09,570 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-07-13 20:41:09,807 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:41:10,229 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-07-13 20:41:10,596 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-07-13 20:41:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:10,661 INFO L93 Difference]: Finished difference Result 3064 states and 10226 transitions. [2021-07-13 20:41:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:41:10,662 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 [2021-07-13 20:41:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:10,667 INFO L225 Difference]: With dead ends: 3064 [2021-07-13 20:41:10,667 INFO L226 Difference]: Without dead ends: 3049 [2021-07-13 20:41:10,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3868.0ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:41:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-13 20:41:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2147. [2021-07-13 20:41:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.428238583410997) internal successors, (7357), 2146 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7357 transitions. [2021-07-13 20:41:10,698 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7357 transitions. Word has length 26 [2021-07-13 20:41:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:10,698 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7357 transitions. [2021-07-13 20:41:10,699 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) [2021-07-13 20:41:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7357 transitions. [2021-07-13 20:41:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:10,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:10,701 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] [2021-07-13 20:41:10,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3648 [2021-07-13 20:41:10,902 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:10,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 54 times [2021-07-13 20:41:10,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:10,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947346497] [2021-07-13 20:41:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:11,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:11,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947346497] [2021-07-13 20:41:11,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947346497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:11,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065830504] [2021-07-13 20:41:11,298 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 [2021-07-13 20:41:11,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:41:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:11,694 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-13 20:41:11,747 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_426, v_prenex_425], 6=[A, v_prenex_427]} [2021-07-13 20:41:11,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:11,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:11,762 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 [2021-07-13 20:41:11,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:11,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:11,780 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:11,780 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 27 treesize of output 23 [2021-07-13 20:41:11,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:11,926 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-07-13 20:41:11,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:11,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:11,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:11,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:11,940 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 22 treesize of output 24 [2021-07-13 20:41:11,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:11,956 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:11,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:41:11,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:12,087 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:41:12,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:12,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:12,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:12,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-07-13 20:41:12,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:12,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,121 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:12,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-13 20:41:12,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:12,244 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:41:12,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:12,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:12,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:12,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:12,262 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 43 treesize of output 31 [2021-07-13 20:41:12,264 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:12,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:12,276 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 43 treesize of output 31 [2021-07-13 20:41:12,277 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:12,384 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-13 20:41:12,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:12,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:12,392 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:409, output treesize:246 [2021-07-13 20:41:12,559 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-07-13 20:41:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:12,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065830504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:12,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:12,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:12,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460657144] [2021-07-13 20:41:12,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:12,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:12,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:12,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:12,674 INFO L87 Difference]: Start difference. First operand 2147 states and 7357 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) [2021-07-13 20:41:13,415 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 20:41:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:14,245 INFO L93 Difference]: Finished difference Result 2844 states and 9528 transitions. [2021-07-13 20:41:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:41:14,246 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 [2021-07-13 20:41:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:14,250 INFO L225 Difference]: With dead ends: 2844 [2021-07-13 20:41:14,250 INFO L226 Difference]: Without dead ends: 2819 [2021-07-13 20:41:14,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1948.4ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:41:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-07-13 20:41:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2143. [2021-07-13 20:41:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.429971988795518) internal successors, (7347), 2142 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7347 transitions. [2021-07-13 20:41:14,280 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7347 transitions. Word has length 26 [2021-07-13 20:41:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:14,280 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7347 transitions. [2021-07-13 20:41:14,280 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) [2021-07-13 20:41:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7347 transitions. [2021-07-13 20:41:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:14,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:14,283 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] [2021-07-13 20:41:14,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3694 [2021-07-13 20:41:14,484 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:14,484 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-07-13 20:41:14,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:14,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847972687] [2021-07-13 20:41:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:14,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:14,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847972687] [2021-07-13 20:41:14,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847972687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:14,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377084701] [2021-07-13 20:41:14,836 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 [2021-07-13 20:41:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:14,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:14,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:15,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,346 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 [2021-07-13 20:41:15,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,353 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 [2021-07-13 20:41:15,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,361 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 [2021-07-13 20:41:15,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,368 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 [2021-07-13 20:41:15,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,388 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 [2021-07-13 20:41:15,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,396 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:41:15,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,403 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 34 treesize of output 16 [2021-07-13 20:41:15,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,411 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 39 treesize of output 13 [2021-07-13 20:41:15,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,418 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 33 treesize of output 13 [2021-07-13 20:41:15,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,426 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 30 treesize of output 16 [2021-07-13 20:41:15,427 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,434 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 [2021-07-13 20:41:15,434 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,441 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 [2021-07-13 20:41:15,441 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,448 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:41:15,448 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,455 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 [2021-07-13 20:41:15,455 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:15,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:15,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:41:15,459 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:15,484 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:41:15,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:41:15,486 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-13 20:41:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:15,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377084701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:15,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:15,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:41:15,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935143397] [2021-07-13 20:41:15,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:15,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:15,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:15,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:15,502 INFO L87 Difference]: Start difference. First operand 2143 states and 7347 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) [2021-07-13 20:41:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:16,858 INFO L93 Difference]: Finished difference Result 2873 states and 9612 transitions. [2021-07-13 20:41:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:41:16,858 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 [2021-07-13 20:41:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:16,864 INFO L225 Difference]: With dead ends: 2873 [2021-07-13 20:41:16,864 INFO L226 Difference]: Without dead ends: 2851 [2021-07-13 20:41:16,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1349.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:41:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-07-13 20:41:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2169. [2021-07-13 20:41:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 3.4321955719557193) internal successors, (7441), 2168 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7441 transitions. [2021-07-13 20:41:16,910 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7441 transitions. Word has length 26 [2021-07-13 20:41:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:16,910 INFO L482 AbstractCegarLoop]: Abstraction has 2169 states and 7441 transitions. [2021-07-13 20:41:16,910 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) [2021-07-13 20:41:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7441 transitions. [2021-07-13 20:41:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:16,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:16,913 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] [2021-07-13 20:41:17,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3715 [2021-07-13 20:41:17,114 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-07-13 20:41:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:17,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699531218] [2021-07-13 20:41:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:17,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:17,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699531218] [2021-07-13 20:41:17,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699531218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:17,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622013982] [2021-07-13 20:41:17,383 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 [2021-07-13 20:41:17,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:17,712 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:41:17,764 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_428, v_prenex_432], 5=[A, v_prenex_430]} [2021-07-13 20:41:17,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:17,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:17,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-07-13 20:41:17,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:17,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:17,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:17,865 INFO L628 ElimStorePlain]: treesize reduction 147, result has 42.6 percent of original size [2021-07-13 20:41:17,865 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-07-13 20:41:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:17,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:17,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:41:17,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:17,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:17,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:17,904 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 29 treesize of output 13 [2021-07-13 20:41:17,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:17,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:17,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:41:17,933 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:33 [2021-07-13 20:41:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:17,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622013982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:17,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:17,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:41:17,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345688056] [2021-07-13 20:41:17,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:17,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:17,980 INFO L87 Difference]: Start difference. First operand 2169 states and 7441 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) [2021-07-13 20:41:19,547 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-13 20:41:19,675 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 20:41:19,829 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:41:19,985 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:41:20,123 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-13 20:41:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:20,375 INFO L93 Difference]: Finished difference Result 3222 states and 10652 transitions. [2021-07-13 20:41:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:41:20,375 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 [2021-07-13 20:41:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:20,382 INFO L225 Difference]: With dead ends: 3222 [2021-07-13 20:41:20,382 INFO L226 Difference]: Without dead ends: 3182 [2021-07-13 20:41:20,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2430.2ms TimeCoverageRelationStatistics Valid=527, Invalid=1825, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-07-13 20:41:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2156. [2021-07-13 20:41:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.432018561484919) internal successors, (7396), 2155 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7396 transitions. [2021-07-13 20:41:20,416 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7396 transitions. Word has length 26 [2021-07-13 20:41:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:20,416 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7396 transitions. [2021-07-13 20:41:20,416 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) [2021-07-13 20:41:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7396 transitions. [2021-07-13 20:41:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:20,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:20,419 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] [2021-07-13 20:41:20,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3821,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:20,620 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 55 times [2021-07-13 20:41:20,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:20,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72023708] [2021-07-13 20:41:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:21,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:21,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72023708] [2021-07-13 20:41:21,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72023708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:21,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845301522] [2021-07-13 20:41:21,019 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 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 [2021-07-13 20:41:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:21,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:21,462 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:41:21,754 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-07-13 20:41:21,811 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_443, v_prenex_444], 2=[A, v_prenex_445]} [2021-07-13 20:41:21,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,815 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 [2021-07-13 20:41:21,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,932 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:41:21,933 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.3 percent of original size [2021-07-13 20:41:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,937 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 [2021-07-13 20:41:21,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:21,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:21,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:21,990 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:41:21,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:22,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:22,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:22,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:22,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:22,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:41:22,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:22,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:22,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:41:22,047 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:41:22,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:22,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:22,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:41:22,086 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:207, output treesize:51 [2021-07-13 20:41:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:22,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845301522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:22,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:22,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:22,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350698871] [2021-07-13 20:41:22,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:22,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:22,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:22,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:22,143 INFO L87 Difference]: Start difference. First operand 2156 states and 7396 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) [2021-07-13 20:41:23,102 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-13 20:41:23,531 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-07-13 20:41:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:23,683 INFO L93 Difference]: Finished difference Result 2279 states and 7717 transitions. [2021-07-13 20:41:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:41:23,683 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 [2021-07-13 20:41:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:23,687 INFO L225 Difference]: With dead ends: 2279 [2021-07-13 20:41:23,687 INFO L226 Difference]: Without dead ends: 2264 [2021-07-13 20:41:23,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2021.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:41:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-13 20:41:23,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2159. [2021-07-13 20:41:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 3.4300278035217793) internal successors, (7402), 2158 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 7402 transitions. [2021-07-13 20:41:23,716 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 7402 transitions. Word has length 26 [2021-07-13 20:41:23,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:23,716 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 7402 transitions. [2021-07-13 20:41:23,716 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) [2021-07-13 20:41:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 7402 transitions. [2021-07-13 20:41:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:23,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:23,719 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] [2021-07-13 20:41:23,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3835,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:23,920 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash 16138506, now seen corresponding path program 56 times [2021-07-13 20:41:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:23,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805400071] [2021-07-13 20:41:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:24,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805400071] [2021-07-13 20:41:24,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805400071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412537170] [2021-07-13 20:41:24,298 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 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 [2021-07-13 20:41:24,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:24,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:24,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:24,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:24,756 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:41:24,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:24,834 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:24,834 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 [2021-07-13 20:41:24,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:24,951 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:41:24,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:24,965 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:24,965 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 [2021-07-13 20:41:24,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,079 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-13 20:41:25,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,093 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 [2021-07-13 20:41:25,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,203 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:41:25,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,216 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:25,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:41:25,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,323 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:41:25,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,336 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 [2021-07-13 20:41:25,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,442 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:41:25,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,455 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 [2021-07-13 20:41:25,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,558 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:41:25,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,569 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 28 treesize of output 24 [2021-07-13 20:41:25,573 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:25,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,679 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 33 treesize of output 27 [2021-07-13 20:41:25,680 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:25,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:25,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:25,777 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-13 20:41:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:25,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412537170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:25,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:25,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837549288] [2021-07-13 20:41:25,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:25,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:25,962 INFO L87 Difference]: Start difference. First operand 2159 states and 7402 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) [2021-07-13 20:41:26,289 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 20:41:27,137 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:41:27,635 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-13 20:41:27,969 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-07-13 20:41:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:28,188 INFO L93 Difference]: Finished difference Result 3021 states and 10110 transitions. [2021-07-13 20:41:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:41:28,189 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 [2021-07-13 20:41:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:28,204 INFO L225 Difference]: With dead ends: 3021 [2021-07-13 20:41:28,204 INFO L226 Difference]: Without dead ends: 3006 [2021-07-13 20:41:28,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2518.2ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:41:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-07-13 20:41:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2153. [2021-07-13 20:41:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.427973977695167) internal successors, (7377), 2152 states have internal predecessors, (7377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7377 transitions. [2021-07-13 20:41:28,236 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7377 transitions. Word has length 26 [2021-07-13 20:41:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:28,236 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7377 transitions. [2021-07-13 20:41:28,237 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) [2021-07-13 20:41:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7377 transitions. [2021-07-13 20:41:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:28,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:28,240 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] [2021-07-13 20:41:28,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3847 [2021-07-13 20:41:28,445 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-07-13 20:41:28,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:28,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551330841] [2021-07-13 20:41:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:28,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:28,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551330841] [2021-07-13 20:41:28,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551330841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:28,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022306930] [2021-07-13 20:41:28,824 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 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 [2021-07-13 20:41:28,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:28,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:28,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:41:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:29,259 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_469], 3=[v_prenex_467, v_prenex_468]} [2021-07-13 20:41:29,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,274 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 [2021-07-13 20:41:29,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,287 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 [2021-07-13 20:41:29,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,433 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:41:29,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,447 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:29,447 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 21 treesize of output 17 [2021-07-13 20:41:29,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,474 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 26 treesize of output 24 [2021-07-13 20:41:29,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,608 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:41:29,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,622 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 [2021-07-13 20:41:29,626 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,638 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:29,638 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 32 treesize of output 22 [2021-07-13 20:41:29,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,760 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:41:29,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,773 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:41:29,773 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 [2021-07-13 20:41:29,774 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:29,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,784 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 [2021-07-13 20:41:29,787 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:29,890 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-13 20:41:29,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:29,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:29,897 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:365, output treesize:194 [2021-07-13 20:41:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:30,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022306930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:30,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:30,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146689187] [2021-07-13 20:41:30,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:30,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:30,087 INFO L87 Difference]: Start difference. First operand 2153 states and 7377 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) [2021-07-13 20:41:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:31,381 INFO L93 Difference]: Finished difference Result 2848 states and 9544 transitions. [2021-07-13 20:41:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:41:31,381 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 [2021-07-13 20:41:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:31,387 INFO L225 Difference]: With dead ends: 2848 [2021-07-13 20:41:31,387 INFO L226 Difference]: Without dead ends: 2823 [2021-07-13 20:41:31,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1556.0ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:41:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-07-13 20:41:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2129. [2021-07-13 20:41:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-07-13 20:41:31,420 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-07-13 20:41:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:31,420 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-07-13 20:41:31,420 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) [2021-07-13 20:41:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-07-13 20:41:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:31,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:31,423 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] [2021-07-13 20:41:31,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:31,625 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-07-13 20:41:31,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:31,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061280206] [2021-07-13 20:41:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:31,919 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-13 20:41:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:32,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:32,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061280206] [2021-07-13 20:41:32,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061280206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:32,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734306646] [2021-07-13 20:41:32,014 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 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 [2021-07-13 20:41:32,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:32,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:32,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:32,383 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-13 20:41:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,517 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 26 treesize of output 24 [2021-07-13 20:41:32,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,531 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:32,531 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 [2021-07-13 20:41:32,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,667 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:41:32,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,681 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 [2021-07-13 20:41:32,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,694 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 [2021-07-13 20:41:32,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,817 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:41:32,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:32,831 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 28 treesize of output 20 [2021-07-13 20:41:32,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,842 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 28 treesize of output 24 [2021-07-13 20:41:32,846 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,957 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:41:32,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:32,970 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 [2021-07-13 20:41:32,973 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:32,983 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:41:32,983 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 [2021-07-13 20:41:32,985 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:33,086 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-13 20:41:33,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:33,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:41:33,092 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-07-13 20:41:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:33,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734306646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:33,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:33,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:41:33,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265591799] [2021-07-13 20:41:33,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:41:33,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:33,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:41:33,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:33,281 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 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) [2021-07-13 20:41:34,421 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-13 20:41:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:34,470 INFO L93 Difference]: Finished difference Result 2750 states and 9269 transitions. [2021-07-13 20:41:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:34,471 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 [2021-07-13 20:41:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:34,476 INFO L225 Difference]: With dead ends: 2750 [2021-07-13 20:41:34,476 INFO L226 Difference]: Without dead ends: 2735 [2021-07-13 20:41:34,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1551.6ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:41:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-07-13 20:41:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2129. [2021-07-13 20:41:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-07-13 20:41:34,510 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-07-13 20:41:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:34,510 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-07-13 20:41:34,510 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) [2021-07-13 20:41:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-07-13 20:41:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:41:34,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:34,513 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] [2021-07-13 20:41:34,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:34,714 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1496131378, now seen corresponding path program 63 times [2021-07-13 20:41:34,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:34,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160265733] [2021-07-13 20:41:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:35,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160265733] [2021-07-13 20:41:35,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160265733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:35,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441390795] [2021-07-13 20:41:35,061 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 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 [2021-07-13 20:41:35,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:35,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:35,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:41:35,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:35,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,628 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:41:35,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:41:35,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,660 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:41:35,660 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 39 treesize of output 33 [2021-07-13 20:41:35,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,689 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:41:35,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 31 [2021-07-13 20:41:35,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,715 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:41:35,715 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 [2021-07-13 20:41:35,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,742 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:41:35,743 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 28 [2021-07-13 20:41:35,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,769 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:41:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:41:35,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:35,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:41:35,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,820 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:35,820 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 [2021-07-13 20:41:35,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:41:35,845 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 [2021-07-13 20:41:35,852 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,869 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:35,870 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 33 treesize of output 1 [2021-07-13 20:41:35,870 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,888 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:35,888 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 41 treesize of output 1 [2021-07-13 20:41:35,889 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,906 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:35,906 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 [2021-07-13 20:41:35,906 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,922 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:35,922 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 [2021-07-13 20:41:35,923 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,949 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:41:35,950 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 [2021-07-13 20:41:35,953 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,968 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:35,968 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 [2021-07-13 20:41:35,969 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:41:35,978 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:41:35,978 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 [2021-07-13 20:41:35,978 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:41:36,128 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-07-13 20:41:36,128 INFO L628 ElimStorePlain]: treesize reduction 140, result has 39.9 percent of original size [2021-07-13 20:41:36,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:41:36,131 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-07-13 20:41:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:36,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441390795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:36,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:36,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:41:36,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578556721] [2021-07-13 20:41:36,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:41:36,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:36,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:41:36,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:36,233 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 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) [2021-07-13 20:41:37,927 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-13 20:41:38,669 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-13 20:41:38,964 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-07-13 20:41:39,180 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-13 20:41:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:39,290 INFO L93 Difference]: Finished difference Result 3313 states and 10903 transitions. [2021-07-13 20:41:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:41:39,290 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 [2021-07-13 20:41:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,296 INFO L225 Difference]: With dead ends: 3313 [2021-07-13 20:41:39,297 INFO L226 Difference]: Without dead ends: 3269 [2021-07-13 20:41:39,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2951.3ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:41:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-07-13 20:41:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2147. [2021-07-13 20:41:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.4221808014911463) internal successors, (7344), 2146 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7344 transitions. [2021-07-13 20:41:39,333 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7344 transitions. Word has length 26 [2021-07-13 20:41:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,333 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7344 transitions. [2021-07-13 20:41:39,333 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) [2021-07-13 20:41:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7344 transitions. [2021-07-13 20:41:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:39,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,336 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] [2021-07-13 20:41:39,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3930,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:39,537 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-07-13 20:41:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550364741] [2021-07-13 20:41:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550364741] [2021-07-13 20:41:39,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550364741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986005692] [2021-07-13 20:41:39,579 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 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 [2021-07-13 20:41:39,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986005692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:39,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:39,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444391297] [2021-07-13 20:41:39,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:39,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:39,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:39,707 INFO L87 Difference]: Start difference. First operand 2147 states and 7344 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) [2021-07-13 20:41:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,649 INFO L93 Difference]: Finished difference Result 5131 states and 15966 transitions. [2021-07-13 20:41:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:41:40,650 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 [2021-07-13 20:41:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,660 INFO L225 Difference]: With dead ends: 5131 [2021-07-13 20:41:40,660 INFO L226 Difference]: Without dead ends: 5131 [2021-07-13 20:41:40,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 543.0ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:41:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-07-13 20:41:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 2340. [2021-07-13 20:41:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 3.469431380932022) internal successors, (8115), 2339 states have internal predecessors, (8115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 8115 transitions. [2021-07-13 20:41:40,719 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 8115 transitions. Word has length 28 [2021-07-13 20:41:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,719 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 8115 transitions. [2021-07-13 20:41:40,719 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) [2021-07-13 20:41:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 8115 transitions. [2021-07-13 20:41:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:40,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,723 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] [2021-07-13 20:41:40,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:40,924 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-07-13 20:41:40,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073473817] [2021-07-13 20:41:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073473817] [2021-07-13 20:41:40,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073473817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887535649] [2021-07-13 20:41:40,965 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 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 [2021-07-13 20:41:40,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887535649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:41,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:41:41,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642608952] [2021-07-13 20:41:41,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:41,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:41,101 INFO L87 Difference]: Start difference. First operand 2340 states and 8115 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) [2021-07-13 20:41:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:42,345 INFO L93 Difference]: Finished difference Result 6763 states and 20717 transitions. [2021-07-13 20:41:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:41:42,345 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 [2021-07-13 20:41:42,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:42,360 INFO L225 Difference]: With dead ends: 6763 [2021-07-13 20:41:42,360 INFO L226 Difference]: Without dead ends: 6763 [2021-07-13 20:41:42,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 745.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:41:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-07-13 20:41:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 2351. [2021-07-13 20:41:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 3.4761702127659575) internal successors, (8169), 2350 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 8169 transitions. [2021-07-13 20:41:42,436 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 8169 transitions. Word has length 28 [2021-07-13 20:41:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:42,436 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 8169 transitions. [2021-07-13 20:41:42,437 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) [2021-07-13 20:41:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 8169 transitions. [2021-07-13 20:41:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:42,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:42,440 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] [2021-07-13 20:41:42,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4062 [2021-07-13 20:41:42,641 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-07-13 20:41:42,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:42,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681622626] [2021-07-13 20:41:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:42,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681622626] [2021-07-13 20:41:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681622626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129240965] [2021-07-13 20:41:42,684 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 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 [2021-07-13 20:41:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:42,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:42,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129240965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:42,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:42,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:41:42,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577547224] [2021-07-13 20:41:42,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:41:42,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:42,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:41:42,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:41:42,833 INFO L87 Difference]: Start difference. First operand 2351 states and 8169 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) [2021-07-13 20:41:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:44,060 INFO L93 Difference]: Finished difference Result 6150 states and 19231 transitions. [2021-07-13 20:41:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:41:44,060 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 [2021-07-13 20:41:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:44,072 INFO L225 Difference]: With dead ends: 6150 [2021-07-13 20:41:44,073 INFO L226 Difference]: Without dead ends: 6150 [2021-07-13 20:41:44,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:41:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6150 states. [2021-07-13 20:41:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6150 to 2299. [2021-07-13 20:41:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.4538729329852047) internal successors, (7937), 2298 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7937 transitions. [2021-07-13 20:41:44,155 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7937 transitions. Word has length 28 [2021-07-13 20:41:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:44,155 INFO L482 AbstractCegarLoop]: Abstraction has 2299 states and 7937 transitions. [2021-07-13 20:41:44,156 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) [2021-07-13 20:41:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7937 transitions. [2021-07-13 20:41:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:44,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:44,159 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] [2021-07-13 20:41:44,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-07-13 20:41:44,361 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-07-13 20:41:44,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:44,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605786186] [2021-07-13 20:41:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:44,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605786186] [2021-07-13 20:41:44,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605786186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639234454] [2021-07-13 20:41:44,402 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 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 [2021-07-13 20:41:44,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:44,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:44,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639234454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:44,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:41:44,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214379984] [2021-07-13 20:41:44,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:44,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:44,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:44,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:44,526 INFO L87 Difference]: Start difference. First operand 2299 states and 7937 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) [2021-07-13 20:41:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:45,582 INFO L93 Difference]: Finished difference Result 5206 states and 16106 transitions. [2021-07-13 20:41:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:41:45,583 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 [2021-07-13 20:41:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:45,593 INFO L225 Difference]: With dead ends: 5206 [2021-07-13 20:41:45,593 INFO L226 Difference]: Without dead ends: 5206 [2021-07-13 20:41:45,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:41:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-07-13 20:41:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 2309. [2021-07-13 20:41:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.450173310225303) internal successors, (7963), 2308 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7963 transitions. [2021-07-13 20:41:45,664 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7963 transitions. Word has length 28 [2021-07-13 20:41:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:45,664 INFO L482 AbstractCegarLoop]: Abstraction has 2309 states and 7963 transitions. [2021-07-13 20:41:45,664 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) [2021-07-13 20:41:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7963 transitions. [2021-07-13 20:41:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:45,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:45,668 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] [2021-07-13 20:41:45,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-07-13 20:41:45,880 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:45,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 64 times [2021-07-13 20:41:45,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:45,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535762138] [2021-07-13 20:41:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:45,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535762138] [2021-07-13 20:41:45,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535762138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224309632] [2021-07-13 20:41:45,923 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 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 [2021-07-13 20:41:45,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:45,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:45,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:46,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224309632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:46,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:46,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:41:46,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718754264] [2021-07-13 20:41:46,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:46,044 INFO L87 Difference]: Start difference. First operand 2309 states and 7963 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) [2021-07-13 20:41:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:46,612 INFO L93 Difference]: Finished difference Result 4633 states and 14522 transitions. [2021-07-13 20:41:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:41:46,612 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 [2021-07-13 20:41:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:46,620 INFO L225 Difference]: With dead ends: 4633 [2021-07-13 20:41:46,620 INFO L226 Difference]: Without dead ends: 4633 [2021-07-13 20:41:46,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:41:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-07-13 20:41:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 2379. [2021-07-13 20:41:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.433978132884777) internal successors, (8166), 2378 states have internal predecessors, (8166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8166 transitions. [2021-07-13 20:41:46,667 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8166 transitions. Word has length 28 [2021-07-13 20:41:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:46,667 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8166 transitions. [2021-07-13 20:41:46,667 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) [2021-07-13 20:41:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8166 transitions. [2021-07-13 20:41:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:46,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:46,671 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] [2021-07-13 20:41:46,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-07-13 20:41:46,871 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:46,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-07-13 20:41:46,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:46,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692943106] [2021-07-13 20:41:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:46,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:46,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692943106] [2021-07-13 20:41:46,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692943106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:46,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662203921] [2021-07-13 20:41:46,901 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 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 [2021-07-13 20:41:46,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:46,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:46,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662203921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:46,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:46,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:41:46,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032629979] [2021-07-13 20:41:46,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:46,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:46,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:46,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:46,991 INFO L87 Difference]: Start difference. First operand 2379 states and 8166 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) [2021-07-13 20:41:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:47,175 INFO L93 Difference]: Finished difference Result 3856 states and 12614 transitions. [2021-07-13 20:41:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:47,176 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 [2021-07-13 20:41:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:47,183 INFO L225 Difference]: With dead ends: 3856 [2021-07-13 20:41:47,183 INFO L226 Difference]: Without dead ends: 3832 [2021-07-13 20:41:47,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-07-13 20:41:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2739. [2021-07-13 20:41:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 3.50036523009496) internal successors, (9584), 2738 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 9584 transitions. [2021-07-13 20:41:47,241 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 9584 transitions. Word has length 28 [2021-07-13 20:41:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:47,241 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 9584 transitions. [2021-07-13 20:41:47,241 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) [2021-07-13 20:41:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 9584 transitions. [2021-07-13 20:41:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:47,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:47,245 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] [2021-07-13 20:41:47,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-13 20:41:47,445 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-07-13 20:41:47,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:47,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570863148] [2021-07-13 20:41:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:47,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:47,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570863148] [2021-07-13 20:41:47,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570863148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150375538] [2021-07-13 20:41:47,486 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 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 [2021-07-13 20:41:47,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:47,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:47,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:47,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:47,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150375538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:47,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:41:47,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340907810] [2021-07-13 20:41:47,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:41:47,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:47,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:41:47,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:47,599 INFO L87 Difference]: Start difference. First operand 2739 states and 9584 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) [2021-07-13 20:41:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:48,206 INFO L93 Difference]: Finished difference Result 4478 states and 14368 transitions. [2021-07-13 20:41:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:41:48,207 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 [2021-07-13 20:41:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:48,216 INFO L225 Difference]: With dead ends: 4478 [2021-07-13 20:41:48,216 INFO L226 Difference]: Without dead ends: 4431 [2021-07-13 20:41:48,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:41:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-07-13 20:41:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2904. [2021-07-13 20:41:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 3.5177402686875645) internal successors, (10212), 2903 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 10212 transitions. [2021-07-13 20:41:48,279 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 10212 transitions. Word has length 28 [2021-07-13 20:41:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:48,279 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 10212 transitions. [2021-07-13 20:41:48,279 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) [2021-07-13 20:41:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 10212 transitions. [2021-07-13 20:41:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:48,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:48,284 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] [2021-07-13 20:41:48,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-13 20:41:48,485 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-07-13 20:41:48,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:48,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359318881] [2021-07-13 20:41:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:48,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359318881] [2021-07-13 20:41:48,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359318881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173527533] [2021-07-13 20:41:48,527 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 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 [2021-07-13 20:41:48,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173527533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:48,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:48,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700778226] [2021-07-13 20:41:48,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:48,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:48,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:48,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:48,645 INFO L87 Difference]: Start difference. First operand 2904 states and 10212 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) [2021-07-13 20:41:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:49,402 INFO L93 Difference]: Finished difference Result 4785 states and 15055 transitions. [2021-07-13 20:41:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:41:49,402 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 [2021-07-13 20:41:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:49,411 INFO L225 Difference]: With dead ends: 4785 [2021-07-13 20:41:49,411 INFO L226 Difference]: Without dead ends: 4759 [2021-07-13 20:41:49,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-07-13 20:41:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 2922. [2021-07-13 20:41:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.5217391304347827) internal successors, (10287), 2921 states have internal predecessors, (10287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10287 transitions. [2021-07-13 20:41:49,471 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10287 transitions. Word has length 28 [2021-07-13 20:41:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:49,471 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10287 transitions. [2021-07-13 20:41:49,471 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) [2021-07-13 20:41:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10287 transitions. [2021-07-13 20:41:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:49,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:49,476 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] [2021-07-13 20:41:49,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-07-13 20:41:49,693 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:49,693 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-07-13 20:41:49,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:49,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388760295] [2021-07-13 20:41:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:49,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:49,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388760295] [2021-07-13 20:41:49,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388760295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:49,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043954441] [2021-07-13 20:41:49,728 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 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 [2021-07-13 20:41:49,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:49,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043954441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:49,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:49,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:49,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170289708] [2021-07-13 20:41:49,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:49,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:49,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:49,847 INFO L87 Difference]: Start difference. First operand 2922 states and 10287 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) [2021-07-13 20:41:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:50,524 INFO L93 Difference]: Finished difference Result 4783 states and 15074 transitions. [2021-07-13 20:41:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:41:50,525 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 [2021-07-13 20:41:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:50,534 INFO L225 Difference]: With dead ends: 4783 [2021-07-13 20:41:50,534 INFO L226 Difference]: Without dead ends: 4771 [2021-07-13 20:41:50,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2021-07-13 20:41:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 2922. [2021-07-13 20:41:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.515576857240671) internal successors, (10269), 2921 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10269 transitions. [2021-07-13 20:41:50,596 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10269 transitions. Word has length 28 [2021-07-13 20:41:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:50,597 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10269 transitions. [2021-07-13 20:41:50,597 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) [2021-07-13 20:41:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10269 transitions. [2021-07-13 20:41:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:50,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:50,601 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] [2021-07-13 20:41:50,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:50,802 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-07-13 20:41:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:50,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009545668] [2021-07-13 20:41:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:50,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009545668] [2021-07-13 20:41:50,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009545668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147150391] [2021-07-13 20:41:50,835 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 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 [2021-07-13 20:41:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147150391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:50,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:50,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110148701] [2021-07-13 20:41:50,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:50,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:50,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:50,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:50,929 INFO L87 Difference]: Start difference. First operand 2922 states and 10269 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) [2021-07-13 20:41:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:51,493 INFO L93 Difference]: Finished difference Result 5554 states and 17878 transitions. [2021-07-13 20:41:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:41:51,493 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 [2021-07-13 20:41:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:51,504 INFO L225 Difference]: With dead ends: 5554 [2021-07-13 20:41:51,504 INFO L226 Difference]: Without dead ends: 5507 [2021-07-13 20:41:51,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:41:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-07-13 20:41:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3068. [2021-07-13 20:41:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 3.5598304532116076) internal successors, (10918), 3067 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 10918 transitions. [2021-07-13 20:41:51,573 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 10918 transitions. Word has length 28 [2021-07-13 20:41:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:51,574 INFO L482 AbstractCegarLoop]: Abstraction has 3068 states and 10918 transitions. [2021-07-13 20:41:51,574 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) [2021-07-13 20:41:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 10918 transitions. [2021-07-13 20:41:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:51,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:51,600 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] [2021-07-13 20:41:51,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4070,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:51,800 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-07-13 20:41:51,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:51,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702439800] [2021-07-13 20:41:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:51,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:51,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702439800] [2021-07-13 20:41:51,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702439800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:51,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75265990] [2021-07-13 20:41:51,826 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 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 [2021-07-13 20:41:51,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:51,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:51,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:51,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75265990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:51,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:51,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:51,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552494000] [2021-07-13 20:41:51,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:51,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:51,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:51,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:51,913 INFO L87 Difference]: Start difference. First operand 3068 states and 10918 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) [2021-07-13 20:41:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:52,079 INFO L93 Difference]: Finished difference Result 4356 states and 14401 transitions. [2021-07-13 20:41:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:52,079 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 [2021-07-13 20:41:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:52,087 INFO L225 Difference]: With dead ends: 4356 [2021-07-13 20:41:52,087 INFO L226 Difference]: Without dead ends: 4356 [2021-07-13 20:41:52,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-07-13 20:41:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 2879. [2021-07-13 20:41:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 3.5295343988881167) internal successors, (10158), 2878 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10158 transitions. [2021-07-13 20:41:52,142 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10158 transitions. Word has length 28 [2021-07-13 20:41:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:52,142 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10158 transitions. [2021-07-13 20:41:52,142 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) [2021-07-13 20:41:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10158 transitions. [2021-07-13 20:41:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:52,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:52,146 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] [2021-07-13 20:41:52,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4071 [2021-07-13 20:41:52,347 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:52,347 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-07-13 20:41:52,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:52,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646089449] [2021-07-13 20:41:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:52,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646089449] [2021-07-13 20:41:52,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646089449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472751199] [2021-07-13 20:41:52,382 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 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 [2021-07-13 20:41:52,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:41:52,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472751199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:52,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:52,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563099131] [2021-07-13 20:41:52,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:52,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:52,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:52,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:52,484 INFO L87 Difference]: Start difference. First operand 2879 states and 10158 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) [2021-07-13 20:41:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:53,167 INFO L93 Difference]: Finished difference Result 6267 states and 19847 transitions. [2021-07-13 20:41:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:41:53,168 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 [2021-07-13 20:41:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:53,202 INFO L225 Difference]: With dead ends: 6267 [2021-07-13 20:41:53,202 INFO L226 Difference]: Without dead ends: 6267 [2021-07-13 20:41:53,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-07-13 20:41:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 2897. [2021-07-13 20:41:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2896 states have (on average 3.5293508287292816) internal successors, (10221), 2896 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 10221 transitions. [2021-07-13 20:41:53,270 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 10221 transitions. Word has length 28 [2021-07-13 20:41:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:53,270 INFO L482 AbstractCegarLoop]: Abstraction has 2897 states and 10221 transitions. [2021-07-13 20:41:53,270 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) [2021-07-13 20:41:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 10221 transitions. [2021-07-13 20:41:53,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:53,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:53,275 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] [2021-07-13 20:41:53,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-07-13 20:41:53,476 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-07-13 20:41:53,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:53,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319543294] [2021-07-13 20:41:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:53,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319543294] [2021-07-13 20:41:53,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319543294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351271283] [2021-07-13 20:41:53,510 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 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 [2021-07-13 20:41:53,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:53,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351271283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:53,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:53,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119010009] [2021-07-13 20:41:53,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:53,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:53,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:53,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:53,612 INFO L87 Difference]: Start difference. First operand 2897 states and 10221 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) [2021-07-13 20:41:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:54,358 INFO L93 Difference]: Finished difference Result 6510 states and 20600 transitions. [2021-07-13 20:41:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:41:54,358 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 [2021-07-13 20:41:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:54,371 INFO L225 Difference]: With dead ends: 6510 [2021-07-13 20:41:54,371 INFO L226 Difference]: Without dead ends: 6510 [2021-07-13 20:41:54,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:41:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-07-13 20:41:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 2991. [2021-07-13 20:41:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.5210702341137123) internal successors, (10528), 2990 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 10528 transitions. [2021-07-13 20:41:54,472 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 10528 transitions. Word has length 28 [2021-07-13 20:41:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:54,472 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 10528 transitions. [2021-07-13 20:41:54,472 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) [2021-07-13 20:41:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 10528 transitions. [2021-07-13 20:41:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:54,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:54,476 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] [2021-07-13 20:41:54,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:54,677 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-07-13 20:41:54,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:54,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838786828] [2021-07-13 20:41:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:54,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838786828] [2021-07-13 20:41:54,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838786828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509278358] [2021-07-13 20:41:54,713 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 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 [2021-07-13 20:41:54,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:54,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509278358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:54,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:54,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780399078] [2021-07-13 20:41:54,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:54,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:54,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:54,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:54,817 INFO L87 Difference]: Start difference. First operand 2991 states and 10528 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) [2021-07-13 20:41:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:55,467 INFO L93 Difference]: Finished difference Result 6652 states and 21097 transitions. [2021-07-13 20:41:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:41:55,467 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 [2021-07-13 20:41:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:55,483 INFO L225 Difference]: With dead ends: 6652 [2021-07-13 20:41:55,483 INFO L226 Difference]: Without dead ends: 6616 [2021-07-13 20:41:55,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 372.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:41:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-07-13 20:41:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 3393. [2021-07-13 20:41:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.5474646226415096) internal successors, (12033), 3392 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12033 transitions. [2021-07-13 20:41:55,579 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12033 transitions. Word has length 28 [2021-07-13 20:41:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:55,579 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12033 transitions. [2021-07-13 20:41:55,580 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) [2021-07-13 20:41:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12033 transitions. [2021-07-13 20:41:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:55,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:55,585 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] [2021-07-13 20:41:55,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-07-13 20:41:55,786 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-07-13 20:41:55,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:55,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43561379] [2021-07-13 20:41:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:55,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43561379] [2021-07-13 20:41:55,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43561379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889552836] [2021-07-13 20:41:55,819 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 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 [2021-07-13 20:41:55,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:55,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889552836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:55,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684525386] [2021-07-13 20:41:55,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:55,936 INFO L87 Difference]: Start difference. First operand 3393 states and 12033 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) [2021-07-13 20:41:56,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:56,549 INFO L93 Difference]: Finished difference Result 6827 states and 21583 transitions. [2021-07-13 20:41:56,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:41:56,550 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 [2021-07-13 20:41:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:56,564 INFO L225 Difference]: With dead ends: 6827 [2021-07-13 20:41:56,564 INFO L226 Difference]: Without dead ends: 6827 [2021-07-13 20:41:56,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 377.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:41:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2021-07-13 20:41:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 3104. [2021-07-13 20:41:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 3.5078955849178213) internal successors, (10885), 3103 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 10885 transitions. [2021-07-13 20:41:56,656 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 10885 transitions. Word has length 28 [2021-07-13 20:41:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:56,656 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 10885 transitions. [2021-07-13 20:41:56,656 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) [2021-07-13 20:41:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 10885 transitions. [2021-07-13 20:41:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:56,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:56,661 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] [2021-07-13 20:41:56,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-07-13 20:41:56,862 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:56,862 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-07-13 20:41:56,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:56,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333251432] [2021-07-13 20:41:56,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:56,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333251432] [2021-07-13 20:41:56,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333251432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916941908] [2021-07-13 20:41:56,897 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 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 [2021-07-13 20:41:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916941908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:56,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:56,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381529708] [2021-07-13 20:41:56,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:56,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:56,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:56,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:56,991 INFO L87 Difference]: Start difference. First operand 3104 states and 10885 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) [2021-07-13 20:41:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:57,664 INFO L93 Difference]: Finished difference Result 5999 states and 19332 transitions. [2021-07-13 20:41:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:41:57,665 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 [2021-07-13 20:41:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:57,676 INFO L225 Difference]: With dead ends: 5999 [2021-07-13 20:41:57,677 INFO L226 Difference]: Without dead ends: 5995 [2021-07-13 20:41:57,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:41:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-07-13 20:41:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 2864. [2021-07-13 20:41:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2863 states have (on average 3.5337059028990567) internal successors, (10117), 2863 states have internal predecessors, (10117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 10117 transitions. [2021-07-13 20:41:57,749 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 10117 transitions. Word has length 28 [2021-07-13 20:41:57,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:57,749 INFO L482 AbstractCegarLoop]: Abstraction has 2864 states and 10117 transitions. [2021-07-13 20:41:57,749 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) [2021-07-13 20:41:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 10117 transitions. [2021-07-13 20:41:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:57,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:57,753 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] [2021-07-13 20:41:57,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-13 20:41:57,954 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:57,954 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-07-13 20:41:57,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:57,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591097973] [2021-07-13 20:41:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:57,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591097973] [2021-07-13 20:41:57,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591097973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974218782] [2021-07-13 20:41:57,989 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 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 [2021-07-13 20:41:58,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:58,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974218782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:58,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:58,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833763936] [2021-07-13 20:41:58,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:58,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:58,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:58,132 INFO L87 Difference]: Start difference. First operand 2864 states and 10117 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) [2021-07-13 20:41:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:59,182 INFO L93 Difference]: Finished difference Result 9242 states and 30126 transitions. [2021-07-13 20:41:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:41:59,183 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 [2021-07-13 20:41:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:59,200 INFO L225 Difference]: With dead ends: 9242 [2021-07-13 20:41:59,200 INFO L226 Difference]: Without dead ends: 9242 [2021-07-13 20:41:59,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:41:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-07-13 20:41:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 3043. [2021-07-13 20:41:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 3.6058514135437214) internal successors, (10969), 3042 states have internal predecessors, (10969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10969 transitions. [2021-07-13 20:41:59,297 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10969 transitions. Word has length 28 [2021-07-13 20:41:59,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:59,297 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 10969 transitions. [2021-07-13 20:41:59,297 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) [2021-07-13 20:41:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10969 transitions. [2021-07-13 20:41:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:59,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:59,301 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] [2021-07-13 20:41:59,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-07-13 20:41:59,502 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-07-13 20:41:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:59,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520240763] [2021-07-13 20:41:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:59,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520240763] [2021-07-13 20:41:59,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520240763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852747654] [2021-07-13 20:41:59,548 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 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 [2021-07-13 20:41:59,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:41:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:59,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:59,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852747654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:59,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:41:59,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122904757] [2021-07-13 20:41:59,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:59,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:59,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:59,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:59,695 INFO L87 Difference]: Start difference. First operand 3043 states and 10969 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) [2021-07-13 20:42:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:00,725 INFO L93 Difference]: Finished difference Result 9069 states and 29656 transitions. [2021-07-13 20:42:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:42:00,725 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 [2021-07-13 20:42:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:00,747 INFO L225 Difference]: With dead ends: 9069 [2021-07-13 20:42:00,747 INFO L226 Difference]: Without dead ends: 9069 [2021-07-13 20:42:00,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 601.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:42:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9069 states. [2021-07-13 20:42:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9069 to 3012. [2021-07-13 20:42:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 3.5888409166389903) internal successors, (10806), 3011 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 10806 transitions. [2021-07-13 20:42:00,856 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 10806 transitions. Word has length 28 [2021-07-13 20:42:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:00,856 INFO L482 AbstractCegarLoop]: Abstraction has 3012 states and 10806 transitions. [2021-07-13 20:42:00,856 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) [2021-07-13 20:42:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 10806 transitions. [2021-07-13 20:42:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:00,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:00,861 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] [2021-07-13 20:42:01,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-13 20:42:01,061 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-07-13 20:42:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:01,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816656542] [2021-07-13 20:42:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:01,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816656542] [2021-07-13 20:42:01,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816656542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139886977] [2021-07-13 20:42:01,096 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 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 [2021-07-13 20:42:01,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:01,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:01,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139886977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:01,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:01,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457975162] [2021-07-13 20:42:01,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:01,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:01,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:01,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:01,207 INFO L87 Difference]: Start difference. First operand 3012 states and 10806 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) [2021-07-13 20:42:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:02,121 INFO L93 Difference]: Finished difference Result 8513 states and 26929 transitions. [2021-07-13 20:42:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:42:02,122 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 [2021-07-13 20:42:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:02,139 INFO L225 Difference]: With dead ends: 8513 [2021-07-13 20:42:02,139 INFO L226 Difference]: Without dead ends: 8513 [2021-07-13 20:42:02,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:42:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2021-07-13 20:42:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 3032. [2021-07-13 20:42:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.5922137908281093) internal successors, (10888), 3031 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 10888 transitions. [2021-07-13 20:42:02,235 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 10888 transitions. Word has length 28 [2021-07-13 20:42:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:02,236 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 10888 transitions. [2021-07-13 20:42:02,236 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) [2021-07-13 20:42:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 10888 transitions. [2021-07-13 20:42:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:02,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:02,240 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] [2021-07-13 20:42:02,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-07-13 20:42:02,441 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:02,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-07-13 20:42:02,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:02,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991652408] [2021-07-13 20:42:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991652408] [2021-07-13 20:42:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991652408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618638447] [2021-07-13 20:42:02,474 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 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 [2021-07-13 20:42:02,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:42:02,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:02,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:02,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618638447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:02,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208036915] [2021-07-13 20:42:02,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:02,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:02,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:02,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:02,577 INFO L87 Difference]: Start difference. First operand 3032 states and 10888 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) [2021-07-13 20:42:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:03,441 INFO L93 Difference]: Finished difference Result 8020 states and 25736 transitions. [2021-07-13 20:42:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:42:03,441 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 [2021-07-13 20:42:03,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:03,458 INFO L225 Difference]: With dead ends: 8020 [2021-07-13 20:42:03,459 INFO L226 Difference]: Without dead ends: 8012 [2021-07-13 20:42:03,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:42:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-07-13 20:42:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3014. [2021-07-13 20:42:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5881181546631264) internal successors, (10811), 3013 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10811 transitions. [2021-07-13 20:42:03,551 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10811 transitions. Word has length 28 [2021-07-13 20:42:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:03,551 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10811 transitions. [2021-07-13 20:42:03,551 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) [2021-07-13 20:42:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10811 transitions. [2021-07-13 20:42:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:03,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:03,556 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] [2021-07-13 20:42:03,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:03,756 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-07-13 20:42:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:03,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823236255] [2021-07-13 20:42:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:03,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823236255] [2021-07-13 20:42:03,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823236255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930838233] [2021-07-13 20:42:03,791 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 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 [2021-07-13 20:42:03,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:42:03,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:03,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930838233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:03,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:03,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353015328] [2021-07-13 20:42:03,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:03,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:03,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:03,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:03,912 INFO L87 Difference]: Start difference. First operand 3014 states and 10811 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) [2021-07-13 20:42:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:04,887 INFO L93 Difference]: Finished difference Result 7945 states and 25505 transitions. [2021-07-13 20:42:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:42:04,887 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 [2021-07-13 20:42:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:04,902 INFO L225 Difference]: With dead ends: 7945 [2021-07-13 20:42:04,902 INFO L226 Difference]: Without dead ends: 7945 [2021-07-13 20:42:04,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:42:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-07-13 20:42:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3030. [2021-07-13 20:42:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.5902938263453286) internal successors, (10875), 3029 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 10875 transitions. [2021-07-13 20:42:04,978 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 10875 transitions. Word has length 28 [2021-07-13 20:42:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:04,979 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 10875 transitions. [2021-07-13 20:42:04,979 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) [2021-07-13 20:42:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 10875 transitions. [2021-07-13 20:42:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:04,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:04,983 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] [2021-07-13 20:42:05,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4081 [2021-07-13 20:42:05,183 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-07-13 20:42:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:05,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181476906] [2021-07-13 20:42:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181476906] [2021-07-13 20:42:05,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181476906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244863826] [2021-07-13 20:42:05,217 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 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 [2021-07-13 20:42:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244863826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:05,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:05,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732344739] [2021-07-13 20:42:05,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:05,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:05,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:05,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:05,328 INFO L87 Difference]: Start difference. First operand 3030 states and 10875 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) [2021-07-13 20:42:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:06,317 INFO L93 Difference]: Finished difference Result 7613 states and 24721 transitions. [2021-07-13 20:42:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:42:06,318 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 [2021-07-13 20:42:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:06,334 INFO L225 Difference]: With dead ends: 7613 [2021-07-13 20:42:06,334 INFO L226 Difference]: Without dead ends: 7605 [2021-07-13 20:42:06,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:42:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2021-07-13 20:42:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 2787. [2021-07-13 20:42:06,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 3.5078966259870783) internal successors, (9773), 2786 states have internal predecessors, (9773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 9773 transitions. [2021-07-13 20:42:06,425 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 9773 transitions. Word has length 28 [2021-07-13 20:42:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:06,425 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 9773 transitions. [2021-07-13 20:42:06,425 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) [2021-07-13 20:42:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 9773 transitions. [2021-07-13 20:42:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:06,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:06,429 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] [2021-07-13 20:42:06,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4082,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:06,633 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-07-13 20:42:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:06,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538059876] [2021-07-13 20:42:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:06,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:06,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538059876] [2021-07-13 20:42:06,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538059876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232724707] [2021-07-13 20:42:06,668 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 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 [2021-07-13 20:42:06,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:06,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:06,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:06,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232724707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:06,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:42:06,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390686086] [2021-07-13 20:42:06,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:06,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:06,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:06,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:06,787 INFO L87 Difference]: Start difference. First operand 2787 states and 9773 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) [2021-07-13 20:42:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:07,652 INFO L93 Difference]: Finished difference Result 5810 states and 18592 transitions. [2021-07-13 20:42:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:42:07,653 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 [2021-07-13 20:42:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:07,664 INFO L225 Difference]: With dead ends: 5810 [2021-07-13 20:42:07,664 INFO L226 Difference]: Without dead ends: 5810 [2021-07-13 20:42:07,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:42:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2021-07-13 20:42:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 2799. [2021-07-13 20:42:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 3.506433166547534) internal successors, (9811), 2798 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 9811 transitions. [2021-07-13 20:42:07,726 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 9811 transitions. Word has length 28 [2021-07-13 20:42:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:07,726 INFO L482 AbstractCegarLoop]: Abstraction has 2799 states and 9811 transitions. [2021-07-13 20:42:07,727 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) [2021-07-13 20:42:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 9811 transitions. [2021-07-13 20:42:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:07,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:07,731 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] [2021-07-13 20:42:07,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-07-13 20:42:07,931 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-07-13 20:42:07,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:07,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984646281] [2021-07-13 20:42:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:07,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984646281] [2021-07-13 20:42:07,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984646281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758166236] [2021-07-13 20:42:07,967 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 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 [2021-07-13 20:42:07,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:07,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:07,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758166236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:08,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:08,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764315763] [2021-07-13 20:42:08,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:08,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:08,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:08,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:08,098 INFO L87 Difference]: Start difference. First operand 2799 states and 9811 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) [2021-07-13 20:42:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:09,165 INFO L93 Difference]: Finished difference Result 6586 states and 20579 transitions. [2021-07-13 20:42:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:42:09,165 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 [2021-07-13 20:42:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:09,182 INFO L225 Difference]: With dead ends: 6586 [2021-07-13 20:42:09,182 INFO L226 Difference]: Without dead ends: 6586 [2021-07-13 20:42:09,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 692.5ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:42:09,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2021-07-13 20:42:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 2865. [2021-07-13 20:42:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 3.5013966480446927) internal successors, (10028), 2864 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 10028 transitions. [2021-07-13 20:42:09,263 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 10028 transitions. Word has length 28 [2021-07-13 20:42:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:09,263 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 10028 transitions. [2021-07-13 20:42:09,263 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) [2021-07-13 20:42:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 10028 transitions. [2021-07-13 20:42:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:09,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:09,267 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] [2021-07-13 20:42:09,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4084,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:09,468 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:09,468 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-07-13 20:42:09,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:09,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365219743] [2021-07-13 20:42:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:09,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:09,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365219743] [2021-07-13 20:42:09,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365219743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:09,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274407012] [2021-07-13 20:42:09,507 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 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 [2021-07-13 20:42:09,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:09,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:09,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:09,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:09,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274407012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:09,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:09,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:09,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313372682] [2021-07-13 20:42:09,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:09,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:09,635 INFO L87 Difference]: Start difference. First operand 2865 states and 10028 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) [2021-07-13 20:42:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:10,638 INFO L93 Difference]: Finished difference Result 6152 states and 19441 transitions. [2021-07-13 20:42:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:42:10,638 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 [2021-07-13 20:42:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:10,652 INFO L225 Difference]: With dead ends: 6152 [2021-07-13 20:42:10,652 INFO L226 Difference]: Without dead ends: 6148 [2021-07-13 20:42:10,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:42:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2021-07-13 20:42:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 2791. [2021-07-13 20:42:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.4974910394265235) internal successors, (9758), 2790 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9758 transitions. [2021-07-13 20:42:10,731 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9758 transitions. Word has length 28 [2021-07-13 20:42:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:10,731 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9758 transitions. [2021-07-13 20:42:10,731 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) [2021-07-13 20:42:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9758 transitions. [2021-07-13 20:42:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:10,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:10,735 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] [2021-07-13 20:42:10,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-07-13 20:42:10,937 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:10,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:10,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 65 times [2021-07-13 20:42:10,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:10,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423626198] [2021-07-13 20:42:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:10,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423626198] [2021-07-13 20:42:10,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423626198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463342569] [2021-07-13 20:42:10,983 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 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 [2021-07-13 20:42:11,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:11,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:11,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:11,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463342569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:11,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:11,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:42:11,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235320239] [2021-07-13 20:42:11,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:11,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:11,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:11,088 INFO L87 Difference]: Start difference. First operand 2791 states and 9758 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) [2021-07-13 20:42:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:11,695 INFO L93 Difference]: Finished difference Result 5291 states and 17008 transitions. [2021-07-13 20:42:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:42:11,696 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 [2021-07-13 20:42:11,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:11,707 INFO L225 Difference]: With dead ends: 5291 [2021-07-13 20:42:11,707 INFO L226 Difference]: Without dead ends: 5291 [2021-07-13 20:42:11,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:42:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-07-13 20:42:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 2791. [2021-07-13 20:42:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.499641577060932) internal successors, (9764), 2790 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9764 transitions. [2021-07-13 20:42:11,780 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9764 transitions. Word has length 28 [2021-07-13 20:42:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:11,780 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9764 transitions. [2021-07-13 20:42:11,780 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) [2021-07-13 20:42:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9764 transitions. [2021-07-13 20:42:11,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:11,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:11,785 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] [2021-07-13 20:42:11,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4086,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:11,985 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 66 times [2021-07-13 20:42:11,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:11,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613268122] [2021-07-13 20:42:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:12,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:12,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613268122] [2021-07-13 20:42:12,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613268122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543827882] [2021-07-13 20:42:12,027 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 [2021-07-13 20:42:12,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:12,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:12,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:12,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543827882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:12,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:42:12,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121431138] [2021-07-13 20:42:12,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:12,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:12,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:12,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:12,132 INFO L87 Difference]: Start difference. First operand 2791 states and 9764 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) [2021-07-13 20:42:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:12,900 INFO L93 Difference]: Finished difference Result 5642 states and 18000 transitions. [2021-07-13 20:42:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:42:12,900 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 [2021-07-13 20:42:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:12,919 INFO L225 Difference]: With dead ends: 5642 [2021-07-13 20:42:12,919 INFO L226 Difference]: Without dead ends: 5642 [2021-07-13 20:42:12,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:42:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-07-13 20:42:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 2782. [2021-07-13 20:42:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2781 states have (on average 3.4998202085580727) internal successors, (9733), 2781 states have internal predecessors, (9733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 9733 transitions. [2021-07-13 20:42:13,017 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 9733 transitions. Word has length 28 [2021-07-13 20:42:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:13,017 INFO L482 AbstractCegarLoop]: Abstraction has 2782 states and 9733 transitions. [2021-07-13 20:42:13,017 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) [2021-07-13 20:42:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 9733 transitions. [2021-07-13 20:42:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:13,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:13,022 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] [2021-07-13 20:42:13,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-07-13 20:42:13,222 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:13,222 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 67 times [2021-07-13 20:42:13,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:13,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299521827] [2021-07-13 20:42:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:13,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:13,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299521827] [2021-07-13 20:42:13,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299521827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:13,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937401987] [2021-07-13 20:42:13,264 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 [2021-07-13 20:42:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:13,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:13,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937401987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:13,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:13,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:42:13,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33415487] [2021-07-13 20:42:13,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:13,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:13,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:13,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:13,371 INFO L87 Difference]: Start difference. First operand 2782 states and 9733 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) [2021-07-13 20:42:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:14,240 INFO L93 Difference]: Finished difference Result 6106 states and 19261 transitions. [2021-07-13 20:42:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:42:14,240 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 [2021-07-13 20:42:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:14,256 INFO L225 Difference]: With dead ends: 6106 [2021-07-13 20:42:14,257 INFO L226 Difference]: Without dead ends: 6106 [2021-07-13 20:42:14,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:42:14,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-07-13 20:42:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 2844. [2021-07-13 20:42:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2843 states have (on average 3.4956032360182907) internal successors, (9938), 2843 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 9938 transitions. [2021-07-13 20:42:14,363 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 9938 transitions. Word has length 28 [2021-07-13 20:42:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:14,363 INFO L482 AbstractCegarLoop]: Abstraction has 2844 states and 9938 transitions. [2021-07-13 20:42:14,363 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) [2021-07-13 20:42:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 9938 transitions. [2021-07-13 20:42:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:14,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:14,369 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] [2021-07-13 20:42:14,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-07-13 20:42:14,580 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 68 times [2021-07-13 20:42:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:14,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819966010] [2021-07-13 20:42:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:14,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:14,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819966010] [2021-07-13 20:42:14,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819966010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:14,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258467742] [2021-07-13 20:42:14,615 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 [2021-07-13 20:42:14,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:14,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258467742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:14,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:14,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:42:14,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750372750] [2021-07-13 20:42:14,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:14,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:14,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:14,734 INFO L87 Difference]: Start difference. First operand 2844 states and 9938 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) [2021-07-13 20:42:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:15,299 INFO L93 Difference]: Finished difference Result 6899 states and 23235 transitions. [2021-07-13 20:42:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:42:15,299 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 [2021-07-13 20:42:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:15,314 INFO L225 Difference]: With dead ends: 6899 [2021-07-13 20:42:15,314 INFO L226 Difference]: Without dead ends: 6899 [2021-07-13 20:42:15,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:42:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-07-13 20:42:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4080. [2021-07-13 20:42:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4079 states have (on average 3.613875949987742) internal successors, (14741), 4079 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 14741 transitions. [2021-07-13 20:42:15,414 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 14741 transitions. Word has length 28 [2021-07-13 20:42:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:15,414 INFO L482 AbstractCegarLoop]: Abstraction has 4080 states and 14741 transitions. [2021-07-13 20:42:15,414 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) [2021-07-13 20:42:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 14741 transitions. [2021-07-13 20:42:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:15,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:15,420 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] [2021-07-13 20:42:15,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-07-13 20:42:15,620 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 69 times [2021-07-13 20:42:15,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:15,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48806028] [2021-07-13 20:42:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:15,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:15,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48806028] [2021-07-13 20:42:15,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48806028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:15,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488554956] [2021-07-13 20:42:15,661 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 [2021-07-13 20:42:15,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:42:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:15,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488554956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:15,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:15,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:42:15,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167500038] [2021-07-13 20:42:15,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:15,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:15,757 INFO L87 Difference]: Start difference. First operand 4080 states and 14741 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) [2021-07-13 20:42:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:16,544 INFO L93 Difference]: Finished difference Result 7418 states and 25100 transitions. [2021-07-13 20:42:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:42:16,544 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 [2021-07-13 20:42:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:16,560 INFO L225 Difference]: With dead ends: 7418 [2021-07-13 20:42:16,561 INFO L226 Difference]: Without dead ends: 7414 [2021-07-13 20:42:16,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:42:16,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2021-07-13 20:42:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 3968. [2021-07-13 20:42:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.623140912528359) internal successors, (14373), 3967 states have internal predecessors, (14373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14373 transitions. [2021-07-13 20:42:16,655 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14373 transitions. Word has length 28 [2021-07-13 20:42:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:16,655 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 14373 transitions. [2021-07-13 20:42:16,655 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) [2021-07-13 20:42:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14373 transitions. [2021-07-13 20:42:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:16,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:16,661 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] [2021-07-13 20:42:16,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-07-13 20:42:16,862 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-07-13 20:42:16,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:16,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286406038] [2021-07-13 20:42:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:16,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:16,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286406038] [2021-07-13 20:42:16,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286406038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:16,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4976768] [2021-07-13 20:42:16,890 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 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 [2021-07-13 20:42:16,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:16,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:17,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4976768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:17,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:17,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:17,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631815785] [2021-07-13 20:42:17,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:17,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:17,029 INFO L87 Difference]: Start difference. First operand 3968 states and 14373 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) [2021-07-13 20:42:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:17,844 INFO L93 Difference]: Finished difference Result 8219 states and 27545 transitions. [2021-07-13 20:42:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:42:17,845 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 [2021-07-13 20:42:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:17,863 INFO L225 Difference]: With dead ends: 8219 [2021-07-13 20:42:17,864 INFO L226 Difference]: Without dead ends: 8207 [2021-07-13 20:42:17,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8207 states. [2021-07-13 20:42:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8207 to 4409. [2021-07-13 20:42:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 3.713475499092559) internal successors, (16369), 4408 states have internal predecessors, (16369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 16369 transitions. [2021-07-13 20:42:17,979 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 16369 transitions. Word has length 28 [2021-07-13 20:42:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:17,979 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 16369 transitions. [2021-07-13 20:42:17,979 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) [2021-07-13 20:42:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 16369 transitions. [2021-07-13 20:42:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:17,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:17,987 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] [2021-07-13 20:42:18,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:18,187 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-07-13 20:42:18,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:18,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688118291] [2021-07-13 20:42:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:18,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:18,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688118291] [2021-07-13 20:42:18,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688118291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:18,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6444049] [2021-07-13 20:42:18,216 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 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 [2021-07-13 20:42:18,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:18,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6444049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:18,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:18,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:18,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102018797] [2021-07-13 20:42:18,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:18,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:18,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:18,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:18,332 INFO L87 Difference]: Start difference. First operand 4409 states and 16369 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) [2021-07-13 20:42:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:19,190 INFO L93 Difference]: Finished difference Result 8511 states and 28462 transitions. [2021-07-13 20:42:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:42:19,191 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 [2021-07-13 20:42:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:19,208 INFO L225 Difference]: With dead ends: 8511 [2021-07-13 20:42:19,208 INFO L226 Difference]: Without dead ends: 8511 [2021-07-13 20:42:19,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-07-13 20:42:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4429. [2021-07-13 20:42:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 3.7007678410117433) internal successors, (16387), 4428 states have internal predecessors, (16387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 16387 transitions. [2021-07-13 20:42:19,312 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 16387 transitions. Word has length 28 [2021-07-13 20:42:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:19,312 INFO L482 AbstractCegarLoop]: Abstraction has 4429 states and 16387 transitions. [2021-07-13 20:42:19,312 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) [2021-07-13 20:42:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 16387 transitions. [2021-07-13 20:42:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:19,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:19,320 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] [2021-07-13 20:42:19,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:19,521 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-07-13 20:42:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:19,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185330152] [2021-07-13 20:42:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:19,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185330152] [2021-07-13 20:42:19,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185330152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4917028] [2021-07-13 20:42:19,558 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 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 [2021-07-13 20:42:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:19,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4917028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:19,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:19,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:42:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970986452] [2021-07-13 20:42:19,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:19,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:19,646 INFO L87 Difference]: Start difference. First operand 4429 states and 16387 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) [2021-07-13 20:42:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:20,066 INFO L93 Difference]: Finished difference Result 7882 states and 27809 transitions. [2021-07-13 20:42:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:42:20,066 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 [2021-07-13 20:42:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:20,084 INFO L225 Difference]: With dead ends: 7882 [2021-07-13 20:42:20,084 INFO L226 Difference]: Without dead ends: 7799 [2021-07-13 20:42:20,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:42:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2021-07-13 20:42:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 5872. [2021-07-13 20:42:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5872 states, 5871 states have (on average 3.7629024016351558) internal successors, (22092), 5871 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5872 states to 5872 states and 22092 transitions. [2021-07-13 20:42:20,217 INFO L78 Accepts]: Start accepts. Automaton has 5872 states and 22092 transitions. Word has length 28 [2021-07-13 20:42:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:20,217 INFO L482 AbstractCegarLoop]: Abstraction has 5872 states and 22092 transitions. [2021-07-13 20:42:20,217 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) [2021-07-13 20:42:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5872 states and 22092 transitions. [2021-07-13 20:42:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:20,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:20,227 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] [2021-07-13 20:42:20,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4093 [2021-07-13 20:42:20,427 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-07-13 20:42:20,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:20,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078071117] [2021-07-13 20:42:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:20,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:20,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078071117] [2021-07-13 20:42:20,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078071117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:20,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611638693] [2021-07-13 20:42:20,455 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 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 [2021-07-13 20:42:20,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:20,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:20,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:42:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:20,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611638693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:20,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:20,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:42:20,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227870470] [2021-07-13 20:42:20,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:42:20,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:42:20,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:42:20,557 INFO L87 Difference]: Start difference. First operand 5872 states and 22092 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) [2021-07-13 20:42:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:20,737 INFO L93 Difference]: Finished difference Result 8160 states and 28714 transitions. [2021-07-13 20:42:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:42:20,737 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 [2021-07-13 20:42:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:20,755 INFO L225 Difference]: With dead ends: 8160 [2021-07-13 20:42:20,755 INFO L226 Difference]: Without dead ends: 8160 [2021-07-13 20:42:20,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-07-13 20:42:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 6012. [2021-07-13 20:42:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 3.7394776243553487) internal successors, (22478), 6011 states have internal predecessors, (22478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 22478 transitions. [2021-07-13 20:42:20,879 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 22478 transitions. Word has length 28 [2021-07-13 20:42:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:20,880 INFO L482 AbstractCegarLoop]: Abstraction has 6012 states and 22478 transitions. [2021-07-13 20:42:20,880 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) [2021-07-13 20:42:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 22478 transitions. [2021-07-13 20:42:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:20,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:20,890 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] [2021-07-13 20:42:21,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4094,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:21,091 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-07-13 20:42:21,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:21,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207493471] [2021-07-13 20:42:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:21,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:21,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207493471] [2021-07-13 20:42:21,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207493471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:21,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648279135] [2021-07-13 20:42:21,134 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 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 [2021-07-13 20:42:21,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:21,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:21,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:21,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:21,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648279135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:21,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:21,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:42:21,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78333759] [2021-07-13 20:42:21,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:21,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:21,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:21,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:21,226 INFO L87 Difference]: Start difference. First operand 6012 states and 22478 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) [2021-07-13 20:42:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:22,002 INFO L93 Difference]: Finished difference Result 12545 states and 43647 transitions. [2021-07-13 20:42:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:42:22,002 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 [2021-07-13 20:42:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:22,033 INFO L225 Difference]: With dead ends: 12545 [2021-07-13 20:42:22,033 INFO L226 Difference]: Without dead ends: 12545 [2021-07-13 20:42:22,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:42:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12545 states. [2021-07-13 20:42:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12545 to 6665. [2021-07-13 20:42:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.7554021608643455) internal successors, (25026), 6664 states have internal predecessors, (25026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 25026 transitions. [2021-07-13 20:42:22,215 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 25026 transitions. Word has length 28 [2021-07-13 20:42:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:22,215 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 25026 transitions. [2021-07-13 20:42:22,215 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) [2021-07-13 20:42:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 25026 transitions. [2021-07-13 20:42:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:22,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:22,227 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] [2021-07-13 20:42:22,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-07-13 20:42:22,428 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-07-13 20:42:22,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:22,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074882978] [2021-07-13 20:42:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:22,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074882978] [2021-07-13 20:42:22,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074882978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127674238] [2021-07-13 20:42:22,485 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 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 [2021-07-13 20:42:22,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:22,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:22,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127674238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:22,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:42:22,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350709892] [2021-07-13 20:42:22,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:22,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:22,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:22,587 INFO L87 Difference]: Start difference. First operand 6665 states and 25026 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) [2021-07-13 20:42:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:23,272 INFO L93 Difference]: Finished difference Result 12678 states and 44148 transitions. [2021-07-13 20:42:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:42:23,272 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 [2021-07-13 20:42:23,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:23,306 INFO L225 Difference]: With dead ends: 12678 [2021-07-13 20:42:23,306 INFO L226 Difference]: Without dead ends: 12678 [2021-07-13 20:42:23,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 381.6ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:42:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-07-13 20:42:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 6895. [2021-07-13 20:42:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6895 states, 6894 states have (on average 3.7358572671888597) internal successors, (25755), 6894 states have internal predecessors, (25755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 25755 transitions. [2021-07-13 20:42:23,497 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 25755 transitions. Word has length 28 [2021-07-13 20:42:23,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:23,497 INFO L482 AbstractCegarLoop]: Abstraction has 6895 states and 25755 transitions. [2021-07-13 20:42:23,497 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) [2021-07-13 20:42:23,497 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 25755 transitions. [2021-07-13 20:42:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:23,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:23,510 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] [2021-07-13 20:42:23,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-07-13 20:42:23,711 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:23,711 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-07-13 20:42:23,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:23,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302320500] [2021-07-13 20:42:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:23,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:23,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302320500] [2021-07-13 20:42:23,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302320500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:23,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787625417] [2021-07-13 20:42:23,738 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 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 [2021-07-13 20:42:23,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:23,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:23,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:23,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787625417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:23,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:23,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:42:23,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395372530] [2021-07-13 20:42:23,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:23,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:23,822 INFO L87 Difference]: Start difference. First operand 6895 states and 25755 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) [2021-07-13 20:42:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:24,187 INFO L93 Difference]: Finished difference Result 9371 states and 33680 transitions. [2021-07-13 20:42:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:24,187 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 [2021-07-13 20:42:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:24,208 INFO L225 Difference]: With dead ends: 9371 [2021-07-13 20:42:24,209 INFO L226 Difference]: Without dead ends: 9341 [2021-07-13 20:42:24,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:42:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-07-13 20:42:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7751. [2021-07-13 20:42:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 3.7625806451612904) internal successors, (29160), 7750 states have internal predecessors, (29160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 29160 transitions. [2021-07-13 20:42:24,408 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 29160 transitions. Word has length 28 [2021-07-13 20:42:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:24,408 INFO L482 AbstractCegarLoop]: Abstraction has 7751 states and 29160 transitions. [2021-07-13 20:42:24,408 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) [2021-07-13 20:42:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 29160 transitions. [2021-07-13 20:42:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:24,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:24,423 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] [2021-07-13 20:42:24,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-07-13 20:42:24,623 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:24,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-07-13 20:42:24,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:24,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263398194] [2021-07-13 20:42:24,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:24,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:24,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263398194] [2021-07-13 20:42:24,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263398194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:24,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144793302] [2021-07-13 20:42:24,651 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 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 [2021-07-13 20:42:24,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:24,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:24,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:24,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144793302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:24,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:24,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:42:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222049918] [2021-07-13 20:42:24,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:24,737 INFO L87 Difference]: Start difference. First operand 7751 states and 29160 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) [2021-07-13 20:42:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:25,119 INFO L93 Difference]: Finished difference Result 9993 states and 35743 transitions. [2021-07-13 20:42:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:25,119 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 [2021-07-13 20:42:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:25,143 INFO L225 Difference]: With dead ends: 9993 [2021-07-13 20:42:25,143 INFO L226 Difference]: Without dead ends: 9993 [2021-07-13 20:42:25,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:42:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9993 states. [2021-07-13 20:42:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9993 to 7791. [2021-07-13 20:42:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 3.7585365853658534) internal successors, (29279), 7790 states have internal predecessors, (29279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 29279 transitions. [2021-07-13 20:42:25,387 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 29279 transitions. Word has length 28 [2021-07-13 20:42:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:25,387 INFO L482 AbstractCegarLoop]: Abstraction has 7791 states and 29279 transitions. [2021-07-13 20:42:25,387 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) [2021-07-13 20:42:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 29279 transitions. [2021-07-13 20:42:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:25,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:25,401 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] [2021-07-13 20:42:25,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-07-13 20:42:25,602 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:25,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:25,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-07-13 20:42:25,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:25,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898031642] [2021-07-13 20:42:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:25,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:25,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898031642] [2021-07-13 20:42:25,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898031642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:25,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20890408] [2021-07-13 20:42:25,636 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 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 [2021-07-13 20:42:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:25,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20890408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:25,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:25,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:42:25,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630832449] [2021-07-13 20:42:25,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:25,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:25,718 INFO L87 Difference]: Start difference. First operand 7791 states and 29279 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) [2021-07-13 20:42:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:26,321 INFO L93 Difference]: Finished difference Result 13376 states and 47489 transitions. [2021-07-13 20:42:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:42:26,322 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 [2021-07-13 20:42:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:26,360 INFO L225 Difference]: With dead ends: 13376 [2021-07-13 20:42:26,360 INFO L226 Difference]: Without dead ends: 13372 [2021-07-13 20:42:26,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:42:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2021-07-13 20:42:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 7707. [2021-07-13 20:42:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.7608357124318714) internal successors, (28981), 7706 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 28981 transitions. [2021-07-13 20:42:26,654 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 28981 transitions. Word has length 28 [2021-07-13 20:42:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:26,654 INFO L482 AbstractCegarLoop]: Abstraction has 7707 states and 28981 transitions. [2021-07-13 20:42:26,654 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) [2021-07-13 20:42:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 28981 transitions. [2021-07-13 20:42:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:26,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:26,669 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] [2021-07-13 20:42:26,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4099 [2021-07-13 20:42:26,870 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-07-13 20:42:26,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:26,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886763731] [2021-07-13 20:42:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:26,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886763731] [2021-07-13 20:42:26,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886763731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468338399] [2021-07-13 20:42:26,906 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 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 [2021-07-13 20:42:26,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:27,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468338399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:27,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:27,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:42:27,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530077580] [2021-07-13 20:42:27,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:27,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:27,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:27,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:27,004 INFO L87 Difference]: Start difference. First operand 7707 states and 28981 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) [2021-07-13 20:42:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:27,475 INFO L93 Difference]: Finished difference Result 10234 states and 36622 transitions. [2021-07-13 20:42:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:27,476 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 [2021-07-13 20:42:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:27,502 INFO L225 Difference]: With dead ends: 10234 [2021-07-13 20:42:27,502 INFO L226 Difference]: Without dead ends: 10234 [2021-07-13 20:42:27,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:42:27,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-07-13 20:42:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 7653. [2021-07-13 20:42:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.753659174072138) internal successors, (28723), 7652 states have internal predecessors, (28723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28723 transitions. [2021-07-13 20:42:27,685 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28723 transitions. Word has length 28 [2021-07-13 20:42:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:27,685 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28723 transitions. [2021-07-13 20:42:27,685 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) [2021-07-13 20:42:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28723 transitions. [2021-07-13 20:42:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:27,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:27,700 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] [2021-07-13 20:42:27,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-07-13 20:42:27,901 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:27,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-07-13 20:42:27,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:27,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464681447] [2021-07-13 20:42:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:27,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:27,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464681447] [2021-07-13 20:42:27,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464681447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:27,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804036828] [2021-07-13 20:42:27,943 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 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 [2021-07-13 20:42:27,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:27,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:28,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804036828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:28,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:42:28,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354036486] [2021-07-13 20:42:28,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:28,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:28,026 INFO L87 Difference]: Start difference. First operand 7653 states and 28723 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) [2021-07-13 20:42:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:28,737 INFO L93 Difference]: Finished difference Result 13259 states and 46986 transitions. [2021-07-13 20:42:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:42:28,738 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 [2021-07-13 20:42:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:28,769 INFO L225 Difference]: With dead ends: 13259 [2021-07-13 20:42:28,769 INFO L226 Difference]: Without dead ends: 13247 [2021-07-13 20:42:28,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:42:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13247 states. [2021-07-13 20:42:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13247 to 7653. [2021-07-13 20:42:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.7526136957658127) internal successors, (28715), 7652 states have internal predecessors, (28715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28715 transitions. [2021-07-13 20:42:28,977 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28715 transitions. Word has length 28 [2021-07-13 20:42:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:28,977 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28715 transitions. [2021-07-13 20:42:28,977 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) [2021-07-13 20:42:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28715 transitions. [2021-07-13 20:42:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:28,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:28,990 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] [2021-07-13 20:42:29,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-07-13 20:42:29,191 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:29,191 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-07-13 20:42:29,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:29,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909993317] [2021-07-13 20:42:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:29,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:29,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909993317] [2021-07-13 20:42:29,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909993317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:29,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618671600] [2021-07-13 20:42:29,236 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 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 [2021-07-13 20:42:29,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:29,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:29,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:29,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:29,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618671600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:29,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:29,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:42:29,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566136771] [2021-07-13 20:42:29,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:29,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:29,335 INFO L87 Difference]: Start difference. First operand 7653 states and 28715 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) [2021-07-13 20:42:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:30,575 INFO L93 Difference]: Finished difference Result 20233 states and 70540 transitions. [2021-07-13 20:42:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:42:30,575 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 [2021-07-13 20:42:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:30,636 INFO L225 Difference]: With dead ends: 20233 [2021-07-13 20:42:30,636 INFO L226 Difference]: Without dead ends: 20233 [2021-07-13 20:42:30,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 744.6ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:42:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-07-13 20:42:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 10480. [2021-07-13 20:42:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10480 states, 10479 states have (on average 3.7973089035213285) internal successors, (39792), 10479 states have internal predecessors, (39792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10480 states to 10480 states and 39792 transitions. [2021-07-13 20:42:30,996 INFO L78 Accepts]: Start accepts. Automaton has 10480 states and 39792 transitions. Word has length 28 [2021-07-13 20:42:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:30,996 INFO L482 AbstractCegarLoop]: Abstraction has 10480 states and 39792 transitions. [2021-07-13 20:42:30,996 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) [2021-07-13 20:42:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 10480 states and 39792 transitions. [2021-07-13 20:42:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:31,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:31,014 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] [2021-07-13 20:42:31,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:31,215 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-07-13 20:42:31,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:31,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229181466] [2021-07-13 20:42:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:31,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229181466] [2021-07-13 20:42:31,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229181466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91402046] [2021-07-13 20:42:31,254 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 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 [2021-07-13 20:42:31,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:42:31,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:31,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91402046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:31,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:31,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:42:31,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361390052] [2021-07-13 20:42:31,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:31,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:31,347 INFO L87 Difference]: Start difference. First operand 10480 states and 39792 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) [2021-07-13 20:42:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:32,447 INFO L93 Difference]: Finished difference Result 19460 states and 68525 transitions. [2021-07-13 20:42:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:42:32,447 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 [2021-07-13 20:42:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:32,498 INFO L225 Difference]: With dead ends: 19460 [2021-07-13 20:42:32,498 INFO L226 Difference]: Without dead ends: 19448 [2021-07-13 20:42:32,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 647.8ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:42:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19448 states. [2021-07-13 20:42:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19448 to 10294. [2021-07-13 20:42:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10294 states, 10293 states have (on average 3.8036529680365296) internal successors, (39151), 10293 states have internal predecessors, (39151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10294 states to 10294 states and 39151 transitions. [2021-07-13 20:42:32,956 INFO L78 Accepts]: Start accepts. Automaton has 10294 states and 39151 transitions. Word has length 28 [2021-07-13 20:42:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:32,956 INFO L482 AbstractCegarLoop]: Abstraction has 10294 states and 39151 transitions. [2021-07-13 20:42:32,956 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) [2021-07-13 20:42:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10294 states and 39151 transitions. [2021-07-13 20:42:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:32,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:32,975 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] [2021-07-13 20:42:33,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:33,176 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-07-13 20:42:33,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:33,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937937232] [2021-07-13 20:42:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:33,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:33,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937937232] [2021-07-13 20:42:33,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937937232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:33,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200773056] [2021-07-13 20:42:33,220 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 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 [2021-07-13 20:42:33,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:42:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:33,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:33,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200773056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:33,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:33,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:42:33,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246795232] [2021-07-13 20:42:33,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:33,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:33,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:33,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:33,322 INFO L87 Difference]: Start difference. First operand 10294 states and 39151 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) [2021-07-13 20:42:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:34,386 INFO L93 Difference]: Finished difference Result 19263 states and 67830 transitions. [2021-07-13 20:42:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:42:34,386 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 [2021-07-13 20:42:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:34,437 INFO L225 Difference]: With dead ends: 19263 [2021-07-13 20:42:34,437 INFO L226 Difference]: Without dead ends: 19227 [2021-07-13 20:42:34,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:42:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19227 states. [2021-07-13 20:42:34,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19227 to 10338. [2021-07-13 20:42:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10338 states, 10337 states have (on average 3.8017800135435813) internal successors, (39299), 10337 states have internal predecessors, (39299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10338 states to 10338 states and 39299 transitions. [2021-07-13 20:42:34,901 INFO L78 Accepts]: Start accepts. Automaton has 10338 states and 39299 transitions. Word has length 28 [2021-07-13 20:42:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:34,901 INFO L482 AbstractCegarLoop]: Abstraction has 10338 states and 39299 transitions. [2021-07-13 20:42:34,902 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) [2021-07-13 20:42:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10338 states and 39299 transitions. [2021-07-13 20:42:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:34,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:34,920 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] [2021-07-13 20:42:35,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4104,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:35,120 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:35,120 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-07-13 20:42:35,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:35,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199532971] [2021-07-13 20:42:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:35,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:35,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199532971] [2021-07-13 20:42:35,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199532971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:35,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559759926] [2021-07-13 20:42:35,161 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 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 [2021-07-13 20:42:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:35,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:35,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:35,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559759926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:35,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:35,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:42:35,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839597600] [2021-07-13 20:42:35,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:35,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:35,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:35,278 INFO L87 Difference]: Start difference. First operand 10338 states and 39299 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) [2021-07-13 20:42:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:36,744 INFO L93 Difference]: Finished difference Result 19164 states and 67607 transitions. [2021-07-13 20:42:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:42:36,744 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 [2021-07-13 20:42:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:36,797 INFO L225 Difference]: With dead ends: 19164 [2021-07-13 20:42:36,797 INFO L226 Difference]: Without dead ends: 19164 [2021-07-13 20:42:36,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:42:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19164 states. [2021-07-13 20:42:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19164 to 10534. [2021-07-13 20:42:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10534 states, 10533 states have (on average 3.79274660590525) internal successors, (39949), 10533 states have internal predecessors, (39949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10534 states to 10534 states and 39949 transitions. [2021-07-13 20:42:37,192 INFO L78 Accepts]: Start accepts. Automaton has 10534 states and 39949 transitions. Word has length 28 [2021-07-13 20:42:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:37,193 INFO L482 AbstractCegarLoop]: Abstraction has 10534 states and 39949 transitions. [2021-07-13 20:42:37,193 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) [2021-07-13 20:42:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 10534 states and 39949 transitions. [2021-07-13 20:42:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:37,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:37,211 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] [2021-07-13 20:42:37,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:37,412 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:37,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-07-13 20:42:37,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:37,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968920955] [2021-07-13 20:42:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:37,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:37,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968920955] [2021-07-13 20:42:37,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968920955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:37,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489916205] [2021-07-13 20:42:37,454 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 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 [2021-07-13 20:42:37,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:37,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:37,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:37,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489916205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:37,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:37,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:42:37,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021718694] [2021-07-13 20:42:37,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:37,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:37,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:37,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:37,572 INFO L87 Difference]: Start difference. First operand 10534 states and 39949 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) [2021-07-13 20:42:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:38,808 INFO L93 Difference]: Finished difference Result 18787 states and 66570 transitions. [2021-07-13 20:42:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:42:38,808 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 [2021-07-13 20:42:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:38,863 INFO L225 Difference]: With dead ends: 18787 [2021-07-13 20:42:38,863 INFO L226 Difference]: Without dead ends: 18775 [2021-07-13 20:42:38,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 760.6ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:42:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-07-13 20:42:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10416. [2021-07-13 20:42:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10416 states, 10415 states have (on average 3.797215554488718) internal successors, (39548), 10415 states have internal predecessors, (39548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10416 states to 10416 states and 39548 transitions. [2021-07-13 20:42:39,242 INFO L78 Accepts]: Start accepts. Automaton has 10416 states and 39548 transitions. Word has length 28 [2021-07-13 20:42:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:39,242 INFO L482 AbstractCegarLoop]: Abstraction has 10416 states and 39548 transitions. [2021-07-13 20:42:39,242 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) [2021-07-13 20:42:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 10416 states and 39548 transitions. [2021-07-13 20:42:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:39,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:39,261 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] [2021-07-13 20:42:39,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:39,461 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-07-13 20:42:39,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:39,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602178146] [2021-07-13 20:42:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:39,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:39,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602178146] [2021-07-13 20:42:39,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602178146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920421391] [2021-07-13 20:42:39,501 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 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 [2021-07-13 20:42:39,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:42:39,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:39,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:39,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920421391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:39,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:42:39,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897416529] [2021-07-13 20:42:39,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:39,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:39,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:39,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:39,625 INFO L87 Difference]: Start difference. First operand 10416 states and 39548 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) [2021-07-13 20:42:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:40,749 INFO L93 Difference]: Finished difference Result 18027 states and 64486 transitions. [2021-07-13 20:42:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:42:40,749 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 [2021-07-13 20:42:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:40,878 INFO L225 Difference]: With dead ends: 18027 [2021-07-13 20:42:40,878 INFO L226 Difference]: Without dead ends: 17991 [2021-07-13 20:42:40,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:42:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17991 states. [2021-07-13 20:42:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17991 to 10440. [2021-07-13 20:42:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 3.796149056423029) internal successors, (39628), 10439 states have internal predecessors, (39628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 39628 transitions. [2021-07-13 20:42:41,252 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 39628 transitions. Word has length 28 [2021-07-13 20:42:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:41,252 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 39628 transitions. [2021-07-13 20:42:41,252 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) [2021-07-13 20:42:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 39628 transitions. [2021-07-13 20:42:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:41,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:41,273 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] [2021-07-13 20:42:41,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4107 [2021-07-13 20:42:41,474 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:41,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:41,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-07-13 20:42:41,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:41,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378134400] [2021-07-13 20:42:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:41,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378134400] [2021-07-13 20:42:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378134400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249233725] [2021-07-13 20:42:41,512 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 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 [2021-07-13 20:42:41,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:41,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:41,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249233725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:41,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:41,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:41,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432391048] [2021-07-13 20:42:41,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:41,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:41,658 INFO L87 Difference]: Start difference. First operand 10440 states and 39628 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) [2021-07-13 20:42:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:43,088 INFO L93 Difference]: Finished difference Result 26119 states and 92958 transitions. [2021-07-13 20:42:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:42:43,088 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 [2021-07-13 20:42:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:43,165 INFO L225 Difference]: With dead ends: 26119 [2021-07-13 20:42:43,165 INFO L226 Difference]: Without dead ends: 26119 [2021-07-13 20:42:43,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 838.0ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:42:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26119 states. [2021-07-13 20:42:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26119 to 10727. [2021-07-13 20:42:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10727 states, 10726 states have (on average 3.821928025358941) internal successors, (40994), 10726 states have internal predecessors, (40994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10727 states to 10727 states and 40994 transitions. [2021-07-13 20:42:43,618 INFO L78 Accepts]: Start accepts. Automaton has 10727 states and 40994 transitions. Word has length 28 [2021-07-13 20:42:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:43,618 INFO L482 AbstractCegarLoop]: Abstraction has 10727 states and 40994 transitions. [2021-07-13 20:42:43,618 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) [2021-07-13 20:42:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 10727 states and 40994 transitions. [2021-07-13 20:42:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:43,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:43,639 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] [2021-07-13 20:42:43,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4108,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:43,840 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-07-13 20:42:43,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:43,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095524989] [2021-07-13 20:42:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:43,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:43,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095524989] [2021-07-13 20:42:43,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095524989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:43,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223283879] [2021-07-13 20:42:43,874 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 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 [2021-07-13 20:42:43,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:43,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:43,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:44,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223283879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:44,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:44,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:44,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956631439] [2021-07-13 20:42:44,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:44,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:44,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:44,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:44,004 INFO L87 Difference]: Start difference. First operand 10727 states and 40994 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) [2021-07-13 20:42:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:45,292 INFO L93 Difference]: Finished difference Result 25550 states and 91560 transitions. [2021-07-13 20:42:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:42:45,292 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 [2021-07-13 20:42:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:45,362 INFO L225 Difference]: With dead ends: 25550 [2021-07-13 20:42:45,362 INFO L226 Difference]: Without dead ends: 25550 [2021-07-13 20:42:45,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 748.2ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:42:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25550 states. [2021-07-13 20:42:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25550 to 10629. [2021-07-13 20:42:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 3.8091832894241624) internal successors, (40484), 10628 states have internal predecessors, (40484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 40484 transitions. [2021-07-13 20:42:45,838 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 40484 transitions. Word has length 28 [2021-07-13 20:42:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:45,839 INFO L482 AbstractCegarLoop]: Abstraction has 10629 states and 40484 transitions. [2021-07-13 20:42:45,839 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) [2021-07-13 20:42:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 40484 transitions. [2021-07-13 20:42:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:45,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:45,857 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] [2021-07-13 20:42:46,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4109 [2021-07-13 20:42:46,057 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:46,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-07-13 20:42:46,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:46,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112335682] [2021-07-13 20:42:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:46,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:46,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112335682] [2021-07-13 20:42:46,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112335682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:46,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696230817] [2021-07-13 20:42:46,097 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 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 [2021-07-13 20:42:46,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:46,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:46,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696230817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:46,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:46,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:42:46,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908440605] [2021-07-13 20:42:46,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:46,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:46,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:46,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:46,216 INFO L87 Difference]: Start difference. First operand 10629 states and 40484 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) [2021-07-13 20:42:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:47,063 INFO L93 Difference]: Finished difference Result 20289 states and 72951 transitions. [2021-07-13 20:42:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:42:47,063 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 [2021-07-13 20:42:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:47,122 INFO L225 Difference]: With dead ends: 20289 [2021-07-13 20:42:47,122 INFO L226 Difference]: Without dead ends: 20289 [2021-07-13 20:42:47,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:42:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20289 states. [2021-07-13 20:42:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20289 to 10638. [2021-07-13 20:42:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 3.8081225909560965) internal successors, (40507), 10637 states have internal predecessors, (40507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 40507 transitions. [2021-07-13 20:42:47,427 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 40507 transitions. Word has length 28 [2021-07-13 20:42:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:47,427 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 40507 transitions. [2021-07-13 20:42:47,427 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) [2021-07-13 20:42:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 40507 transitions. [2021-07-13 20:42:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:47,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:47,445 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] [2021-07-13 20:42:47,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4110,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:47,645 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-07-13 20:42:47,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:47,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624471814] [2021-07-13 20:42:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:47,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:47,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624471814] [2021-07-13 20:42:47,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624471814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:47,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673041689] [2021-07-13 20:42:47,680 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 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 [2021-07-13 20:42:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:47,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:47,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:47,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673041689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:47,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:47,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:42:47,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596218649] [2021-07-13 20:42:47,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:47,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:47,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:47,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:47,795 INFO L87 Difference]: Start difference. First operand 10638 states and 40507 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) [2021-07-13 20:42:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:48,622 INFO L93 Difference]: Finished difference Result 18838 states and 68311 transitions. [2021-07-13 20:42:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:42:48,623 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 [2021-07-13 20:42:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:48,669 INFO L225 Difference]: With dead ends: 18838 [2021-07-13 20:42:48,670 INFO L226 Difference]: Without dead ends: 18838 [2021-07-13 20:42:48,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:42:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18838 states. [2021-07-13 20:42:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18838 to 10650. [2021-07-13 20:42:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 3.807399755845619) internal successors, (40545), 10649 states have internal predecessors, (40545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 40545 transitions. [2021-07-13 20:42:49,011 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 40545 transitions. Word has length 28 [2021-07-13 20:42:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:49,011 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 40545 transitions. [2021-07-13 20:42:49,012 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) [2021-07-13 20:42:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 40545 transitions. [2021-07-13 20:42:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:49,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:49,030 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] [2021-07-13 20:42:49,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-07-13 20:42:49,230 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:49,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-07-13 20:42:49,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:49,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647189906] [2021-07-13 20:42:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:49,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:49,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647189906] [2021-07-13 20:42:49,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647189906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:49,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355274457] [2021-07-13 20:42:49,265 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 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 [2021-07-13 20:42:49,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:49,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355274457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:49,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:49,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:49,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738987080] [2021-07-13 20:42:49,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:49,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:49,391 INFO L87 Difference]: Start difference. First operand 10650 states and 40545 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) [2021-07-13 20:42:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:50,454 INFO L93 Difference]: Finished difference Result 19442 states and 70046 transitions. [2021-07-13 20:42:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:42:50,454 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 [2021-07-13 20:42:50,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:50,506 INFO L225 Difference]: With dead ends: 19442 [2021-07-13 20:42:50,506 INFO L226 Difference]: Without dead ends: 19442 [2021-07-13 20:42:50,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:42:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19442 states. [2021-07-13 20:42:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19442 to 10758. [2021-07-13 20:42:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10758 states, 10757 states have (on average 3.8002231105326763) internal successors, (40879), 10757 states have internal predecessors, (40879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 40879 transitions. [2021-07-13 20:42:50,838 INFO L78 Accepts]: Start accepts. Automaton has 10758 states and 40879 transitions. Word has length 28 [2021-07-13 20:42:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:50,838 INFO L482 AbstractCegarLoop]: Abstraction has 10758 states and 40879 transitions. [2021-07-13 20:42:50,838 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) [2021-07-13 20:42:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 10758 states and 40879 transitions. [2021-07-13 20:42:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:50,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:50,856 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] [2021-07-13 20:42:51,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-07-13 20:42:51,057 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-07-13 20:42:51,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:51,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014045760] [2021-07-13 20:42:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:51,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:51,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014045760] [2021-07-13 20:42:51,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014045760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216099836] [2021-07-13 20:42:51,092 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 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 [2021-07-13 20:42:51,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:42:51,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216099836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:51,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:42:51,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871793306] [2021-07-13 20:42:51,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:51,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:51,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:51,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:51,215 INFO L87 Difference]: Start difference. First operand 10758 states and 40879 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) [2021-07-13 20:42:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:52,269 INFO L93 Difference]: Finished difference Result 19017 states and 68890 transitions. [2021-07-13 20:42:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:42:52,269 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 [2021-07-13 20:42:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:52,329 INFO L225 Difference]: With dead ends: 19017 [2021-07-13 20:42:52,329 INFO L226 Difference]: Without dead ends: 19013 [2021-07-13 20:42:52,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 644.8ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:42:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19013 states. [2021-07-13 20:42:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19013 to 10684. [2021-07-13 20:42:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10684 states, 10683 states have (on average 3.804174857249836) internal successors, (40640), 10683 states have internal predecessors, (40640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10684 states to 10684 states and 40640 transitions. [2021-07-13 20:42:52,643 INFO L78 Accepts]: Start accepts. Automaton has 10684 states and 40640 transitions. Word has length 28 [2021-07-13 20:42:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:52,643 INFO L482 AbstractCegarLoop]: Abstraction has 10684 states and 40640 transitions. [2021-07-13 20:42:52,644 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) [2021-07-13 20:42:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 10684 states and 40640 transitions. [2021-07-13 20:42:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:52,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:52,662 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] [2021-07-13 20:42:52,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:52,862 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-07-13 20:42:52,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:52,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389618939] [2021-07-13 20:42:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:52,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389618939] [2021-07-13 20:42:52,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389618939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700657430] [2021-07-13 20:42:52,903 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 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 [2021-07-13 20:42:52,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:52,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:52,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:53,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700657430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:53,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:53,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:42:53,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547387457] [2021-07-13 20:42:53,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:53,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:53,023 INFO L87 Difference]: Start difference. First operand 10684 states and 40640 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) [2021-07-13 20:42:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:54,092 INFO L93 Difference]: Finished difference Result 18448 states and 66382 transitions. [2021-07-13 20:42:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:42:54,093 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 [2021-07-13 20:42:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:54,140 INFO L225 Difference]: With dead ends: 18448 [2021-07-13 20:42:54,140 INFO L226 Difference]: Without dead ends: 18448 [2021-07-13 20:42:54,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 668.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:42:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18448 states. [2021-07-13 20:42:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18448 to 10911. [2021-07-13 20:42:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10911 states, 10910 states have (on average 3.807332722273144) internal successors, (41538), 10910 states have internal predecessors, (41538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10911 states to 10911 states and 41538 transitions. [2021-07-13 20:42:54,446 INFO L78 Accepts]: Start accepts. Automaton has 10911 states and 41538 transitions. Word has length 28 [2021-07-13 20:42:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:54,446 INFO L482 AbstractCegarLoop]: Abstraction has 10911 states and 41538 transitions. [2021-07-13 20:42:54,446 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) [2021-07-13 20:42:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 10911 states and 41538 transitions. [2021-07-13 20:42:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:54,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:54,465 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] [2021-07-13 20:42:54,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4114,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:54,665 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-07-13 20:42:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:54,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760400343] [2021-07-13 20:42:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:54,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:54,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760400343] [2021-07-13 20:42:54,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760400343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:54,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107822018] [2021-07-13 20:42:54,706 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 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 [2021-07-13 20:42:54,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:42:54,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:54,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:54,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107822018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:54,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:54,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:42:54,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108178450] [2021-07-13 20:42:54,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:54,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:54,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:54,819 INFO L87 Difference]: Start difference. First operand 10911 states and 41538 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) [2021-07-13 20:42:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:55,821 INFO L93 Difference]: Finished difference Result 18161 states and 65584 transitions. [2021-07-13 20:42:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:42:55,822 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 [2021-07-13 20:42:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:55,868 INFO L225 Difference]: With dead ends: 18161 [2021-07-13 20:42:55,869 INFO L226 Difference]: Without dead ends: 18149 [2021-07-13 20:42:55,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 558.9ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:42:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18149 states. [2021-07-13 20:42:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18149 to 11013. [2021-07-13 20:42:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 11012 states have (on average 3.801398474391573) internal successors, (41861), 11012 states have internal predecessors, (41861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 41861 transitions. [2021-07-13 20:42:56,193 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 41861 transitions. Word has length 28 [2021-07-13 20:42:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:56,193 INFO L482 AbstractCegarLoop]: Abstraction has 11013 states and 41861 transitions. [2021-07-13 20:42:56,193 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) [2021-07-13 20:42:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 41861 transitions. [2021-07-13 20:42:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:56,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:56,213 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] [2021-07-13 20:42:56,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:56,414 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 70 times [2021-07-13 20:42:56,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:56,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550820655] [2021-07-13 20:42:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:56,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:56,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550820655] [2021-07-13 20:42:56,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550820655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:56,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738067425] [2021-07-13 20:42:56,455 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 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 [2021-07-13 20:42:56,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:56,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:56,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:56,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738067425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:56,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:56,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:42:56,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085146104] [2021-07-13 20:42:56,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:56,544 INFO L87 Difference]: Start difference. First operand 11013 states and 41861 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) [2021-07-13 20:42:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:57,029 INFO L93 Difference]: Finished difference Result 15676 states and 57990 transitions. [2021-07-13 20:42:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:42:57,030 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 [2021-07-13 20:42:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:57,070 INFO L225 Difference]: With dead ends: 15676 [2021-07-13 20:42:57,070 INFO L226 Difference]: Without dead ends: 15676 [2021-07-13 20:42:57,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:42:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15676 states. [2021-07-13 20:42:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15676 to 11085. [2021-07-13 20:42:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11085 states, 11084 states have (on average 3.7969144713099965) internal successors, (42085), 11084 states have internal predecessors, (42085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11085 states to 11085 states and 42085 transitions. [2021-07-13 20:42:57,347 INFO L78 Accepts]: Start accepts. Automaton has 11085 states and 42085 transitions. Word has length 28 [2021-07-13 20:42:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:57,347 INFO L482 AbstractCegarLoop]: Abstraction has 11085 states and 42085 transitions. [2021-07-13 20:42:57,347 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) [2021-07-13 20:42:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11085 states and 42085 transitions. [2021-07-13 20:42:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:57,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:57,367 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] [2021-07-13 20:42:57,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4116,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:57,568 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 71 times [2021-07-13 20:42:57,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:57,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224629464] [2021-07-13 20:42:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:57,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224629464] [2021-07-13 20:42:57,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224629464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668679842] [2021-07-13 20:42:57,603 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 [2021-07-13 20:42:57,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:42:57,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:57,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668679842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:57,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:57,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:42:57,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375995153] [2021-07-13 20:42:57,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:57,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:57,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:57,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:57,693 INFO L87 Difference]: Start difference. First operand 11085 states and 42085 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) [2021-07-13 20:42:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:58,315 INFO L93 Difference]: Finished difference Result 16651 states and 60827 transitions. [2021-07-13 20:42:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:42:58,316 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 [2021-07-13 20:42:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:58,351 INFO L225 Difference]: With dead ends: 16651 [2021-07-13 20:42:58,351 INFO L226 Difference]: Without dead ends: 16651 [2021-07-13 20:42:58,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:42:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16651 states. [2021-07-13 20:42:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16651 to 11413. [2021-07-13 20:42:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11413 states, 11412 states have (on average 3.7797932001402033) internal successors, (43135), 11412 states have internal predecessors, (43135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11413 states to 11413 states and 43135 transitions. [2021-07-13 20:42:58,628 INFO L78 Accepts]: Start accepts. Automaton has 11413 states and 43135 transitions. Word has length 28 [2021-07-13 20:42:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:58,628 INFO L482 AbstractCegarLoop]: Abstraction has 11413 states and 43135 transitions. [2021-07-13 20:42:58,628 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) [2021-07-13 20:42:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 11413 states and 43135 transitions. [2021-07-13 20:42:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:58,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:58,650 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] [2021-07-13 20:42:58,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4117,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:58,851 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:58,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 72 times [2021-07-13 20:42:58,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:58,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992987910] [2021-07-13 20:42:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:58,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:58,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992987910] [2021-07-13 20:42:58,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992987910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:58,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699283839] [2021-07-13 20:42:58,885 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 [2021-07-13 20:42:58,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:42:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:42:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:58,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699283839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:58,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:58,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:42:58,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652327255] [2021-07-13 20:42:58,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:42:58,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:58,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:42:58,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:42:58,972 INFO L87 Difference]: Start difference. First operand 11413 states and 43135 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) [2021-07-13 20:42:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:59,445 INFO L93 Difference]: Finished difference Result 16138 states and 59485 transitions. [2021-07-13 20:42:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:42:59,445 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 [2021-07-13 20:42:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:59,490 INFO L225 Difference]: With dead ends: 16138 [2021-07-13 20:42:59,491 INFO L226 Difference]: Without dead ends: 16130 [2021-07-13 20:42:59,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:42:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16130 states. [2021-07-13 20:42:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16130 to 11353. [2021-07-13 20:42:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 3.781800563777308) internal successors, (42931), 11352 states have internal predecessors, (42931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 42931 transitions. [2021-07-13 20:42:59,766 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 42931 transitions. Word has length 28 [2021-07-13 20:42:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:59,766 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 42931 transitions. [2021-07-13 20:42:59,766 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) [2021-07-13 20:42:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 42931 transitions. [2021-07-13 20:42:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:42:59,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:59,786 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] [2021-07-13 20:42:59,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:59,986 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:59,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 73 times [2021-07-13 20:42:59,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:59,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664945608] [2021-07-13 20:42:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:00,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664945608] [2021-07-13 20:43:00,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664945608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936175526] [2021-07-13 20:43:00,026 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 [2021-07-13 20:43:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:00,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:00,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936175526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:00,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:00,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:43:00,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197806558] [2021-07-13 20:43:00,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:00,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:00,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:00,108 INFO L87 Difference]: Start difference. First operand 11353 states and 42931 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) [2021-07-13 20:43:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:00,594 INFO L93 Difference]: Finished difference Result 16038 states and 59197 transitions. [2021-07-13 20:43:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:43:00,595 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 [2021-07-13 20:43:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:00,640 INFO L225 Difference]: With dead ends: 16038 [2021-07-13 20:43:00,640 INFO L226 Difference]: Without dead ends: 16026 [2021-07-13 20:43:00,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:43:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16026 states. [2021-07-13 20:43:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16026 to 11325. [2021-07-13 20:43:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11325 states, 11324 states have (on average 3.7826739667961853) internal successors, (42835), 11324 states have internal predecessors, (42835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 42835 transitions. [2021-07-13 20:43:00,925 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 42835 transitions. Word has length 28 [2021-07-13 20:43:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:00,925 INFO L482 AbstractCegarLoop]: Abstraction has 11325 states and 42835 transitions. [2021-07-13 20:43:00,926 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) [2021-07-13 20:43:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 42835 transitions. [2021-07-13 20:43:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:01,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:01,032 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] [2021-07-13 20:43:01,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:01,233 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 74 times [2021-07-13 20:43:01,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:01,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008897919] [2021-07-13 20:43:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:01,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:01,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008897919] [2021-07-13 20:43:01,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008897919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538883319] [2021-07-13 20:43:01,268 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 [2021-07-13 20:43:01,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:01,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:01,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538883319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:01,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:43:01,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335218693] [2021-07-13 20:43:01,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:01,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:01,385 INFO L87 Difference]: Start difference. First operand 11325 states and 42835 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) [2021-07-13 20:43:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:02,353 INFO L93 Difference]: Finished difference Result 21822 states and 77756 transitions. [2021-07-13 20:43:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:43:02,354 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 [2021-07-13 20:43:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:02,410 INFO L225 Difference]: With dead ends: 21822 [2021-07-13 20:43:02,410 INFO L226 Difference]: Without dead ends: 21822 [2021-07-13 20:43:02,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:43:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21822 states. [2021-07-13 20:43:02,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21822 to 11307. [2021-07-13 20:43:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 3.7813550327259864) internal successors, (42752), 11306 states have internal predecessors, (42752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 42752 transitions. [2021-07-13 20:43:02,713 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 42752 transitions. Word has length 28 [2021-07-13 20:43:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:02,713 INFO L482 AbstractCegarLoop]: Abstraction has 11307 states and 42752 transitions. [2021-07-13 20:43:02,713 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) [2021-07-13 20:43:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 42752 transitions. [2021-07-13 20:43:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:02,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:02,732 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] [2021-07-13 20:43:02,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4120,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:02,933 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-07-13 20:43:02,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:02,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092675255] [2021-07-13 20:43:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:02,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:02,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092675255] [2021-07-13 20:43:02,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092675255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:02,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019193885] [2021-07-13 20:43:02,960 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 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 [2021-07-13 20:43:02,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:02,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:03,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019193885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:03,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:03,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:43:03,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329941490] [2021-07-13 20:43:03,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:03,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:03,073 INFO L87 Difference]: Start difference. First operand 11307 states and 42752 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) [2021-07-13 20:43:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:03,792 INFO L93 Difference]: Finished difference Result 17653 states and 63688 transitions. [2021-07-13 20:43:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:43:03,792 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 [2021-07-13 20:43:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:03,837 INFO L225 Difference]: With dead ends: 17653 [2021-07-13 20:43:03,837 INFO L226 Difference]: Without dead ends: 17640 [2021-07-13 20:43:03,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:43:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2021-07-13 20:43:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 12618. [2021-07-13 20:43:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.8484584291035904) internal successors, (48556), 12617 states have internal predecessors, (48556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 48556 transitions. [2021-07-13 20:43:04,268 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 48556 transitions. Word has length 28 [2021-07-13 20:43:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:04,268 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 48556 transitions. [2021-07-13 20:43:04,268 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) [2021-07-13 20:43:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 48556 transitions. [2021-07-13 20:43:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:04,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:04,290 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] [2021-07-13 20:43:04,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-07-13 20:43:04,491 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:04,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-07-13 20:43:04,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:04,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489716750] [2021-07-13 20:43:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:04,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489716750] [2021-07-13 20:43:04,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489716750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486423994] [2021-07-13 20:43:04,518 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 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 [2021-07-13 20:43:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:04,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:04,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:04,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486423994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:04,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:43:04,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415227592] [2021-07-13 20:43:04,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:04,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:04,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:04,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:04,627 INFO L87 Difference]: Start difference. First operand 12618 states and 48556 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) [2021-07-13 20:43:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:05,389 INFO L93 Difference]: Finished difference Result 17754 states and 63945 transitions. [2021-07-13 20:43:05,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:43:05,389 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 [2021-07-13 20:43:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:05,446 INFO L225 Difference]: With dead ends: 17754 [2021-07-13 20:43:05,446 INFO L226 Difference]: Without dead ends: 17748 [2021-07-13 20:43:05,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:43:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17748 states. [2021-07-13 20:43:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17748 to 12591. [2021-07-13 20:43:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12591 states, 12590 states have (on average 3.8476568705321683) internal successors, (48442), 12590 states have internal predecessors, (48442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12591 states to 12591 states and 48442 transitions. [2021-07-13 20:43:05,825 INFO L78 Accepts]: Start accepts. Automaton has 12591 states and 48442 transitions. Word has length 28 [2021-07-13 20:43:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:05,825 INFO L482 AbstractCegarLoop]: Abstraction has 12591 states and 48442 transitions. [2021-07-13 20:43:05,825 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) [2021-07-13 20:43:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 12591 states and 48442 transitions. [2021-07-13 20:43:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:05,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:05,848 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] [2021-07-13 20:43:06,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-07-13 20:43:06,049 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:06,049 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-07-13 20:43:06,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:06,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196393560] [2021-07-13 20:43:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:06,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:06,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196393560] [2021-07-13 20:43:06,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196393560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:06,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123208055] [2021-07-13 20:43:06,076 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 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 [2021-07-13 20:43:06,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:06,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123208055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:06,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:06,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:43:06,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877769261] [2021-07-13 20:43:06,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:06,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:06,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:06,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:06,177 INFO L87 Difference]: Start difference. First operand 12591 states and 48442 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) [2021-07-13 20:43:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:06,809 INFO L93 Difference]: Finished difference Result 19810 states and 71449 transitions. [2021-07-13 20:43:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:43:06,810 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 [2021-07-13 20:43:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:06,861 INFO L225 Difference]: With dead ends: 19810 [2021-07-13 20:43:06,862 INFO L226 Difference]: Without dead ends: 19797 [2021-07-13 20:43:06,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:43:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19797 states. [2021-07-13 20:43:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19797 to 12651. [2021-07-13 20:43:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.8523320158102767) internal successors, (48732), 12650 states have internal predecessors, (48732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 48732 transitions. [2021-07-13 20:43:07,334 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 48732 transitions. Word has length 28 [2021-07-13 20:43:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:07,334 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 48732 transitions. [2021-07-13 20:43:07,334 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) [2021-07-13 20:43:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 48732 transitions. [2021-07-13 20:43:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:07,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:07,360 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] [2021-07-13 20:43:07,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-07-13 20:43:07,561 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-07-13 20:43:07,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:07,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148252279] [2021-07-13 20:43:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:07,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:07,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148252279] [2021-07-13 20:43:07,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148252279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:07,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697820996] [2021-07-13 20:43:07,596 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 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 [2021-07-13 20:43:07,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:07,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:07,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:07,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:07,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697820996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:07,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:07,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:43:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327346712] [2021-07-13 20:43:07,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:07,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:07,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:07,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:07,700 INFO L87 Difference]: Start difference. First operand 12651 states and 48732 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) [2021-07-13 20:43:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:08,426 INFO L93 Difference]: Finished difference Result 20959 states and 75039 transitions. [2021-07-13 20:43:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:43:08,426 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 [2021-07-13 20:43:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:08,477 INFO L225 Difference]: With dead ends: 20959 [2021-07-13 20:43:08,478 INFO L226 Difference]: Without dead ends: 20959 [2021-07-13 20:43:08,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:43:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20959 states. [2021-07-13 20:43:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20959 to 12667. [2021-07-13 20:43:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12667 states, 12666 states have (on average 3.849281541133744) internal successors, (48755), 12666 states have internal predecessors, (48755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12667 states to 12667 states and 48755 transitions. [2021-07-13 20:43:08,846 INFO L78 Accepts]: Start accepts. Automaton has 12667 states and 48755 transitions. Word has length 28 [2021-07-13 20:43:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:08,846 INFO L482 AbstractCegarLoop]: Abstraction has 12667 states and 48755 transitions. [2021-07-13 20:43:08,846 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) [2021-07-13 20:43:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 12667 states and 48755 transitions. [2021-07-13 20:43:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:08,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:08,869 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] [2021-07-13 20:43:09,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:09,069 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:09,070 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 75 times [2021-07-13 20:43:09,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:09,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028938959] [2021-07-13 20:43:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:09,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:09,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028938959] [2021-07-13 20:43:09,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028938959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:09,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804539258] [2021-07-13 20:43:09,104 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 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 [2021-07-13 20:43:09,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:43:09,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:09,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:09,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804539258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:09,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:09,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:43:09,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742356838] [2021-07-13 20:43:09,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:09,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:09,205 INFO L87 Difference]: Start difference. First operand 12667 states and 48755 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) [2021-07-13 20:43:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:10,142 INFO L93 Difference]: Finished difference Result 22039 states and 80934 transitions. [2021-07-13 20:43:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:43:10,142 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 [2021-07-13 20:43:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:10,199 INFO L225 Difference]: With dead ends: 22039 [2021-07-13 20:43:10,199 INFO L226 Difference]: Without dead ends: 22035 [2021-07-13 20:43:10,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 522.8ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:43:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22035 states. [2021-07-13 20:43:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22035 to 12921. [2021-07-13 20:43:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12921 states, 12920 states have (on average 3.8388544891640866) internal successors, (49598), 12920 states have internal predecessors, (49598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12921 states to 12921 states and 49598 transitions. [2021-07-13 20:43:10,653 INFO L78 Accepts]: Start accepts. Automaton has 12921 states and 49598 transitions. Word has length 28 [2021-07-13 20:43:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:10,653 INFO L482 AbstractCegarLoop]: Abstraction has 12921 states and 49598 transitions. [2021-07-13 20:43:10,653 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) [2021-07-13 20:43:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 12921 states and 49598 transitions. [2021-07-13 20:43:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:10,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:10,677 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] [2021-07-13 20:43:10,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:10,877 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-07-13 20:43:10,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:10,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114427002] [2021-07-13 20:43:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:10,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114427002] [2021-07-13 20:43:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114427002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787189349] [2021-07-13 20:43:10,908 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 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 [2021-07-13 20:43:10,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:10,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:10,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:10,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:11,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787189349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:11,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:11,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:11,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340020868] [2021-07-13 20:43:11,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:11,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:11,001 INFO L87 Difference]: Start difference. First operand 12921 states and 49598 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) [2021-07-13 20:43:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:11,670 INFO L93 Difference]: Finished difference Result 18745 states and 68634 transitions. [2021-07-13 20:43:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:43:11,670 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 [2021-07-13 20:43:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:11,724 INFO L225 Difference]: With dead ends: 18745 [2021-07-13 20:43:11,724 INFO L226 Difference]: Without dead ends: 18722 [2021-07-13 20:43:11,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:43:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18722 states. [2021-07-13 20:43:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18722 to 13216. [2021-07-13 20:43:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13216 states, 13215 states have (on average 3.855996973136587) internal successors, (50957), 13215 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 50957 transitions. [2021-07-13 20:43:12,071 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 50957 transitions. Word has length 28 [2021-07-13 20:43:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:12,071 INFO L482 AbstractCegarLoop]: Abstraction has 13216 states and 50957 transitions. [2021-07-13 20:43:12,071 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) [2021-07-13 20:43:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 50957 transitions. [2021-07-13 20:43:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:12,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:12,095 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] [2021-07-13 20:43:12,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4126,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:12,296 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:12,296 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-07-13 20:43:12,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:12,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116978659] [2021-07-13 20:43:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:12,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:12,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116978659] [2021-07-13 20:43:12,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116978659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:12,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063810709] [2021-07-13 20:43:12,327 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 [2021-07-13 20:43:12,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:43:12,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:12,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:12,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063810709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:12,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:12,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:12,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471423275] [2021-07-13 20:43:12,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:12,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:12,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:12,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:12,425 INFO L87 Difference]: Start difference. First operand 13216 states and 50957 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) [2021-07-13 20:43:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:13,166 INFO L93 Difference]: Finished difference Result 18738 states and 67728 transitions. [2021-07-13 20:43:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:43:13,166 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 [2021-07-13 20:43:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:13,215 INFO L225 Difference]: With dead ends: 18738 [2021-07-13 20:43:13,215 INFO L226 Difference]: Without dead ends: 18738 [2021-07-13 20:43:13,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:43:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18738 states. [2021-07-13 20:43:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18738 to 13171. [2021-07-13 20:43:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 13170 states have (on average 3.847835990888383) internal successors, (50676), 13170 states have internal predecessors, (50676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 50676 transitions. [2021-07-13 20:43:13,603 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 50676 transitions. Word has length 28 [2021-07-13 20:43:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:13,603 INFO L482 AbstractCegarLoop]: Abstraction has 13171 states and 50676 transitions. [2021-07-13 20:43:13,603 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) [2021-07-13 20:43:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 50676 transitions. [2021-07-13 20:43:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:13,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:13,626 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] [2021-07-13 20:43:13,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:13,827 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:13,828 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-07-13 20:43:13,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:13,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822900709] [2021-07-13 20:43:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:13,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:13,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822900709] [2021-07-13 20:43:13,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822900709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:13,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500988083] [2021-07-13 20:43:13,860 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 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 [2021-07-13 20:43:13,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:43:13,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:13,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:13,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500988083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:13,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:13,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:13,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344669427] [2021-07-13 20:43:13,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:13,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:13,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:13,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:13,957 INFO L87 Difference]: Start difference. First operand 13171 states and 50676 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) [2021-07-13 20:43:14,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:14,627 INFO L93 Difference]: Finished difference Result 20089 states and 73010 transitions. [2021-07-13 20:43:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:43:14,627 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 [2021-07-13 20:43:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:14,680 INFO L225 Difference]: With dead ends: 20089 [2021-07-13 20:43:14,680 INFO L226 Difference]: Without dead ends: 20089 [2021-07-13 20:43:14,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:43:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20089 states. [2021-07-13 20:43:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20089 to 13878. [2021-07-13 20:43:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13878 states, 13877 states have (on average 3.834186063270159) internal successors, (53207), 13877 states have internal predecessors, (53207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13878 states to 13878 states and 53207 transitions. [2021-07-13 20:43:15,031 INFO L78 Accepts]: Start accepts. Automaton has 13878 states and 53207 transitions. Word has length 28 [2021-07-13 20:43:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:15,031 INFO L482 AbstractCegarLoop]: Abstraction has 13878 states and 53207 transitions. [2021-07-13 20:43:15,031 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) [2021-07-13 20:43:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 13878 states and 53207 transitions. [2021-07-13 20:43:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:15,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:15,057 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] [2021-07-13 20:43:15,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4128 [2021-07-13 20:43:15,261 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:15,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:15,261 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-07-13 20:43:15,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:15,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147107376] [2021-07-13 20:43:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:15,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:15,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147107376] [2021-07-13 20:43:15,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147107376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:15,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973093810] [2021-07-13 20:43:15,294 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 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 [2021-07-13 20:43:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:15,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:15,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973093810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:15,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:15,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:43:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252367527] [2021-07-13 20:43:15,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:15,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:15,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:15,395 INFO L87 Difference]: Start difference. First operand 13878 states and 53207 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) [2021-07-13 20:43:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:16,225 INFO L93 Difference]: Finished difference Result 22502 states and 80640 transitions. [2021-07-13 20:43:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:43:16,225 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 [2021-07-13 20:43:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:16,283 INFO L225 Difference]: With dead ends: 22502 [2021-07-13 20:43:16,283 INFO L226 Difference]: Without dead ends: 22502 [2021-07-13 20:43:16,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 467.2ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:43:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22502 states. [2021-07-13 20:43:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22502 to 14104. [2021-07-13 20:43:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14104 states, 14103 states have (on average 3.8464156562433525) internal successors, (54246), 14103 states have internal predecessors, (54246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14104 states to 14104 states and 54246 transitions. [2021-07-13 20:43:16,731 INFO L78 Accepts]: Start accepts. Automaton has 14104 states and 54246 transitions. Word has length 28 [2021-07-13 20:43:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:16,731 INFO L482 AbstractCegarLoop]: Abstraction has 14104 states and 54246 transitions. [2021-07-13 20:43:16,731 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) [2021-07-13 20:43:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 14104 states and 54246 transitions. [2021-07-13 20:43:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:16,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:16,757 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] [2021-07-13 20:43:16,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4129,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:16,957 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:16,958 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 76 times [2021-07-13 20:43:16,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:16,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439406115] [2021-07-13 20:43:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:16,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:16,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439406115] [2021-07-13 20:43:16,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439406115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450097001] [2021-07-13 20:43:16,994 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 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 [2021-07-13 20:43:17,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:17,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:17,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:17,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450097001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:17,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:17,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:43:17,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231493639] [2021-07-13 20:43:17,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:17,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:17,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:17,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:17,124 INFO L87 Difference]: Start difference. First operand 14104 states and 54246 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) [2021-07-13 20:43:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:18,720 INFO L93 Difference]: Finished difference Result 39134 states and 140671 transitions. [2021-07-13 20:43:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:43:18,721 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 [2021-07-13 20:43:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:18,856 INFO L225 Difference]: With dead ends: 39134 [2021-07-13 20:43:18,856 INFO L226 Difference]: Without dead ends: 39134 [2021-07-13 20:43:18,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 908.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:43:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39134 states. [2021-07-13 20:43:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39134 to 15340. [2021-07-13 20:43:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15340 states, 15339 states have (on average 3.892887411174131) internal successors, (59713), 15339 states have internal predecessors, (59713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15340 states to 15340 states and 59713 transitions. [2021-07-13 20:43:19,680 INFO L78 Accepts]: Start accepts. Automaton has 15340 states and 59713 transitions. Word has length 28 [2021-07-13 20:43:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:19,680 INFO L482 AbstractCegarLoop]: Abstraction has 15340 states and 59713 transitions. [2021-07-13 20:43:19,680 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) [2021-07-13 20:43:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 15340 states and 59713 transitions. [2021-07-13 20:43:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:19,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:19,710 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] [2021-07-13 20:43:19,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4130,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:19,910 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 77 times [2021-07-13 20:43:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:19,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801146399] [2021-07-13 20:43:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:19,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:19,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801146399] [2021-07-13 20:43:19,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801146399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:19,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861109808] [2021-07-13 20:43:19,944 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 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 [2021-07-13 20:43:19,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:43:19,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:19,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:19,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:20,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861109808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:20,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:43:20,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253141452] [2021-07-13 20:43:20,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:20,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:20,076 INFO L87 Difference]: Start difference. First operand 15340 states and 59713 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) [2021-07-13 20:43:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:21,607 INFO L93 Difference]: Finished difference Result 38160 states and 138109 transitions. [2021-07-13 20:43:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:43:21,607 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 [2021-07-13 20:43:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:21,738 INFO L225 Difference]: With dead ends: 38160 [2021-07-13 20:43:21,738 INFO L226 Difference]: Without dead ends: 38160 [2021-07-13 20:43:21,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 896.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:43:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38160 states. [2021-07-13 20:43:22,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38160 to 15314. [2021-07-13 20:43:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15314 states, 15313 states have (on average 3.88930973682492) internal successors, (59557), 15313 states have internal predecessors, (59557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15314 states to 15314 states and 59557 transitions. [2021-07-13 20:43:22,585 INFO L78 Accepts]: Start accepts. Automaton has 15314 states and 59557 transitions. Word has length 28 [2021-07-13 20:43:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:22,585 INFO L482 AbstractCegarLoop]: Abstraction has 15314 states and 59557 transitions. [2021-07-13 20:43:22,585 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) [2021-07-13 20:43:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 15314 states and 59557 transitions. [2021-07-13 20:43:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:22,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:22,613 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] [2021-07-13 20:43:22,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-07-13 20:43:22,814 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:22,814 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-07-13 20:43:22,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:22,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269969014] [2021-07-13 20:43:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:22,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:22,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269969014] [2021-07-13 20:43:22,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269969014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957084945] [2021-07-13 20:43:22,847 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 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 [2021-07-13 20:43:22,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:22,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:22,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957084945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:22,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:22,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187917588] [2021-07-13 20:43:22,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:22,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:22,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:22,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:22,926 INFO L87 Difference]: Start difference. First operand 15314 states and 59557 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) [2021-07-13 20:43:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:23,207 INFO L93 Difference]: Finished difference Result 23675 states and 90680 transitions. [2021-07-13 20:43:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:43:23,207 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 [2021-07-13 20:43:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:23,280 INFO L225 Difference]: With dead ends: 23675 [2021-07-13 20:43:23,280 INFO L226 Difference]: Without dead ends: 23628 [2021-07-13 20:43:23,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:43:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23628 states. [2021-07-13 20:43:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23628 to 20433. [2021-07-13 20:43:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20433 states, 20432 states have (on average 3.903680501174628) internal successors, (79760), 20432 states have internal predecessors, (79760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20433 states to 20433 states and 79760 transitions. [2021-07-13 20:43:23,772 INFO L78 Accepts]: Start accepts. Automaton has 20433 states and 79760 transitions. Word has length 28 [2021-07-13 20:43:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:23,772 INFO L482 AbstractCegarLoop]: Abstraction has 20433 states and 79760 transitions. [2021-07-13 20:43:23,772 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) [2021-07-13 20:43:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 20433 states and 79760 transitions. [2021-07-13 20:43:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:23,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:23,813 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] [2021-07-13 20:43:24,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4132 [2021-07-13 20:43:24,013 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:24,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-07-13 20:43:24,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:24,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552443910] [2021-07-13 20:43:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:24,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552443910] [2021-07-13 20:43:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552443910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285824066] [2021-07-13 20:43:24,042 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 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 [2021-07-13 20:43:24,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:24,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:24,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285824066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:24,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:24,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:43:24,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608868517] [2021-07-13 20:43:24,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:24,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:24,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:24,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:24,123 INFO L87 Difference]: Start difference. First operand 20433 states and 79760 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) [2021-07-13 20:43:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:24,396 INFO L93 Difference]: Finished difference Result 23187 states and 88130 transitions. [2021-07-13 20:43:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:24,396 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 [2021-07-13 20:43:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:24,471 INFO L225 Difference]: With dead ends: 23187 [2021-07-13 20:43:24,471 INFO L226 Difference]: Without dead ends: 23187 [2021-07-13 20:43:24,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23187 states. [2021-07-13 20:43:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23187 to 19936. [2021-07-13 20:43:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19936 states, 19935 states have (on average 3.89204915976925) internal successors, (77588), 19935 states have internal predecessors, (77588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19936 states to 19936 states and 77588 transitions. [2021-07-13 20:43:25,113 INFO L78 Accepts]: Start accepts. Automaton has 19936 states and 77588 transitions. Word has length 28 [2021-07-13 20:43:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:25,113 INFO L482 AbstractCegarLoop]: Abstraction has 19936 states and 77588 transitions. [2021-07-13 20:43:25,113 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) [2021-07-13 20:43:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 19936 states and 77588 transitions. [2021-07-13 20:43:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:25,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:25,153 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] [2021-07-13 20:43:25,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-07-13 20:43:25,354 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-07-13 20:43:25,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:25,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189064192] [2021-07-13 20:43:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:25,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:25,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189064192] [2021-07-13 20:43:25,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189064192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:25,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245935577] [2021-07-13 20:43:25,428 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 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 [2021-07-13 20:43:25,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:25,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:25,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:25,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245935577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:25,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:25,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:43:25,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977383331] [2021-07-13 20:43:25,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:25,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:25,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:25,571 INFO L87 Difference]: Start difference. First operand 19936 states and 77588 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) [2021-07-13 20:43:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:26,640 INFO L93 Difference]: Finished difference Result 31776 states and 117695 transitions. [2021-07-13 20:43:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:43:26,640 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 [2021-07-13 20:43:26,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:26,740 INFO L225 Difference]: With dead ends: 31776 [2021-07-13 20:43:26,740 INFO L226 Difference]: Without dead ends: 31776 [2021-07-13 20:43:26,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:43:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31776 states. [2021-07-13 20:43:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31776 to 20002. [2021-07-13 20:43:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20002 states, 20001 states have (on average 3.8901054947252636) internal successors, (77806), 20001 states have internal predecessors, (77806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20002 states to 20002 states and 77806 transitions. [2021-07-13 20:43:27,310 INFO L78 Accepts]: Start accepts. Automaton has 20002 states and 77806 transitions. Word has length 28 [2021-07-13 20:43:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:27,310 INFO L482 AbstractCegarLoop]: Abstraction has 20002 states and 77806 transitions. [2021-07-13 20:43:27,310 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) [2021-07-13 20:43:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 20002 states and 77806 transitions. [2021-07-13 20:43:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:27,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:27,347 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] [2021-07-13 20:43:27,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-07-13 20:43:27,547 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:27,548 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-07-13 20:43:27,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:27,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858102778] [2021-07-13 20:43:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:27,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858102778] [2021-07-13 20:43:27,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858102778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206220026] [2021-07-13 20:43:27,586 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 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 [2021-07-13 20:43:27,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:27,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:27,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:27,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206220026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:27,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:27,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:43:27,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392898019] [2021-07-13 20:43:27,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:27,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:27,713 INFO L87 Difference]: Start difference. First operand 20002 states and 77806 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) [2021-07-13 20:43:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:29,350 INFO L93 Difference]: Finished difference Result 40610 states and 148783 transitions. [2021-07-13 20:43:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:43:29,350 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 [2021-07-13 20:43:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:29,484 INFO L225 Difference]: With dead ends: 40610 [2021-07-13 20:43:29,485 INFO L226 Difference]: Without dead ends: 40610 [2021-07-13 20:43:29,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 907.4ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:43:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2021-07-13 20:43:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 20007. [2021-07-13 20:43:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20007 states, 20006 states have (on average 3.892182345296411) internal successors, (77867), 20006 states have internal predecessors, (77867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20007 states to 20007 states and 77867 transitions. [2021-07-13 20:43:30,261 INFO L78 Accepts]: Start accepts. Automaton has 20007 states and 77867 transitions. Word has length 28 [2021-07-13 20:43:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:30,261 INFO L482 AbstractCegarLoop]: Abstraction has 20007 states and 77867 transitions. [2021-07-13 20:43:30,261 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) [2021-07-13 20:43:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20007 states and 77867 transitions. [2021-07-13 20:43:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:30,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:30,299 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] [2021-07-13 20:43:30,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:30,499 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-07-13 20:43:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:30,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984979427] [2021-07-13 20:43:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:30,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:30,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984979427] [2021-07-13 20:43:30,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984979427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:30,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106034867] [2021-07-13 20:43:30,538 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 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 [2021-07-13 20:43:30,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:30,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:30,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:30,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:30,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106034867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:30,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:30,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:43:30,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118888730] [2021-07-13 20:43:30,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:43:30,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:30,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:43:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:43:30,696 INFO L87 Difference]: Start difference. First operand 20007 states and 77867 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) [2021-07-13 20:43:32,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:32,340 INFO L93 Difference]: Finished difference Result 40173 states and 147928 transitions. [2021-07-13 20:43:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:43:32,340 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 [2021-07-13 20:43:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:32,498 INFO L225 Difference]: With dead ends: 40173 [2021-07-13 20:43:32,498 INFO L226 Difference]: Without dead ends: 40173 [2021-07-13 20:43:32,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 936.0ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:43:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40173 states. [2021-07-13 20:43:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40173 to 19795. [2021-07-13 20:43:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19795 states, 19794 states have (on average 3.884308376275639) internal successors, (76886), 19794 states have internal predecessors, (76886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19795 states to 19795 states and 76886 transitions. [2021-07-13 20:43:33,230 INFO L78 Accepts]: Start accepts. Automaton has 19795 states and 76886 transitions. Word has length 28 [2021-07-13 20:43:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:33,230 INFO L482 AbstractCegarLoop]: Abstraction has 19795 states and 76886 transitions. [2021-07-13 20:43:33,230 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) [2021-07-13 20:43:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 19795 states and 76886 transitions. [2021-07-13 20:43:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:33,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:33,267 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] [2021-07-13 20:43:33,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4136,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:33,467 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-07-13 20:43:33,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:33,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816129789] [2021-07-13 20:43:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:33,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816129789] [2021-07-13 20:43:33,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816129789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706366393] [2021-07-13 20:43:33,502 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 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 [2021-07-13 20:43:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:33,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:33,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706366393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:33,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:43:33,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615189223] [2021-07-13 20:43:33,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:33,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:33,595 INFO L87 Difference]: Start difference. First operand 19795 states and 76886 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) [2021-07-13 20:43:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:33,905 INFO L93 Difference]: Finished difference Result 29286 states and 109348 transitions. [2021-07-13 20:43:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:43:33,906 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 [2021-07-13 20:43:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:33,988 INFO L225 Difference]: With dead ends: 29286 [2021-07-13 20:43:33,988 INFO L226 Difference]: Without dead ends: 29269 [2021-07-13 20:43:33,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:43:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29269 states. [2021-07-13 20:43:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29269 to 20063. [2021-07-13 20:43:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20063 states, 20062 states have (on average 3.8898414913767323) internal successors, (78038), 20062 states have internal predecessors, (78038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20063 states to 20063 states and 78038 transitions. [2021-07-13 20:43:34,765 INFO L78 Accepts]: Start accepts. Automaton has 20063 states and 78038 transitions. Word has length 28 [2021-07-13 20:43:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:34,765 INFO L482 AbstractCegarLoop]: Abstraction has 20063 states and 78038 transitions. [2021-07-13 20:43:34,765 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) [2021-07-13 20:43:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20063 states and 78038 transitions. [2021-07-13 20:43:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:34,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:34,807 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] [2021-07-13 20:43:35,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:35,007 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:35,008 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-07-13 20:43:35,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:35,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486499895] [2021-07-13 20:43:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:35,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486499895] [2021-07-13 20:43:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486499895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414096136] [2021-07-13 20:43:35,051 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 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 [2021-07-13 20:43:35,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:35,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:35,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414096136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:35,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:43:35,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434202523] [2021-07-13 20:43:35,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:35,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:35,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:35,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:35,139 INFO L87 Difference]: Start difference. First operand 20063 states and 78038 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) [2021-07-13 20:43:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:35,450 INFO L93 Difference]: Finished difference Result 31067 states and 114897 transitions. [2021-07-13 20:43:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:43:35,451 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 [2021-07-13 20:43:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:35,556 INFO L225 Difference]: With dead ends: 31067 [2021-07-13 20:43:35,556 INFO L226 Difference]: Without dead ends: 31067 [2021-07-13 20:43:35,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31067 states. [2021-07-13 20:43:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31067 to 19732. [2021-07-13 20:43:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19732 states, 19731 states have (on average 3.874714915615022) internal successors, (76452), 19731 states have internal predecessors, (76452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19732 states to 19732 states and 76452 transitions. [2021-07-13 20:43:36,127 INFO L78 Accepts]: Start accepts. Automaton has 19732 states and 76452 transitions. Word has length 28 [2021-07-13 20:43:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:36,127 INFO L482 AbstractCegarLoop]: Abstraction has 19732 states and 76452 transitions. [2021-07-13 20:43:36,127 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) [2021-07-13 20:43:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 19732 states and 76452 transitions. [2021-07-13 20:43:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:36,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:36,167 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] [2021-07-13 20:43:36,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4138,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:36,367 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:36,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:36,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-07-13 20:43:36,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:36,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335204099] [2021-07-13 20:43:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:36,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335204099] [2021-07-13 20:43:36,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335204099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95393274] [2021-07-13 20:43:36,406 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 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 [2021-07-13 20:43:36,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:36,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:36,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:36,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95393274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:36,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:36,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:43:36,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284655329] [2021-07-13 20:43:36,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:36,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:36,511 INFO L87 Difference]: Start difference. First operand 19732 states and 76452 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) [2021-07-13 20:43:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:37,485 INFO L93 Difference]: Finished difference Result 29306 states and 108910 transitions. [2021-07-13 20:43:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:43:37,485 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 [2021-07-13 20:43:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:37,567 INFO L225 Difference]: With dead ends: 29306 [2021-07-13 20:43:37,567 INFO L226 Difference]: Without dead ends: 29306 [2021-07-13 20:43:37,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:43:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29306 states. [2021-07-13 20:43:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29306 to 19780. [2021-07-13 20:43:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 3.8734010819556093) internal successors, (76612), 19779 states have internal predecessors, (76612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 76612 transitions. [2021-07-13 20:43:38,113 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 76612 transitions. Word has length 28 [2021-07-13 20:43:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:38,113 INFO L482 AbstractCegarLoop]: Abstraction has 19780 states and 76612 transitions. [2021-07-13 20:43:38,113 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) [2021-07-13 20:43:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 76612 transitions. [2021-07-13 20:43:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:38,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:38,149 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] [2021-07-13 20:43:38,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:38,350 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-07-13 20:43:38,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:38,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869280402] [2021-07-13 20:43:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:38,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869280402] [2021-07-13 20:43:38,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869280402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669545686] [2021-07-13 20:43:38,388 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 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 [2021-07-13 20:43:38,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:38,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669545686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:38,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:38,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:43:38,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991660664] [2021-07-13 20:43:38,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:38,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:38,492 INFO L87 Difference]: Start difference. First operand 19780 states and 76612 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) [2021-07-13 20:43:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:39,532 INFO L93 Difference]: Finished difference Result 30838 states and 113300 transitions. [2021-07-13 20:43:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:43:39,533 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 [2021-07-13 20:43:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:39,633 INFO L225 Difference]: With dead ends: 30838 [2021-07-13 20:43:39,633 INFO L226 Difference]: Without dead ends: 30838 [2021-07-13 20:43:39,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:43:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30838 states. [2021-07-13 20:43:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30838 to 20326. [2021-07-13 20:43:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20326 states, 20325 states have (on average 3.8521525215252153) internal successors, (78295), 20325 states have internal predecessors, (78295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 78295 transitions. [2021-07-13 20:43:40,379 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 78295 transitions. Word has length 28 [2021-07-13 20:43:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:40,379 INFO L482 AbstractCegarLoop]: Abstraction has 20326 states and 78295 transitions. [2021-07-13 20:43:40,379 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) [2021-07-13 20:43:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 78295 transitions. [2021-07-13 20:43:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:40,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:40,414 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] [2021-07-13 20:43:40,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4140 [2021-07-13 20:43:40,615 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-07-13 20:43:40,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:40,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567959810] [2021-07-13 20:43:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:40,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:40,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567959810] [2021-07-13 20:43:40,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567959810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:40,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451642146] [2021-07-13 20:43:40,659 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 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 [2021-07-13 20:43:40,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:40,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:40,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:40,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451642146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:40,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:40,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:43:40,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649397791] [2021-07-13 20:43:40,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:40,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:40,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:40,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:40,756 INFO L87 Difference]: Start difference. First operand 20326 states and 78295 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) [2021-07-13 20:43:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:41,683 INFO L93 Difference]: Finished difference Result 29955 states and 110977 transitions. [2021-07-13 20:43:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:43:41,683 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 [2021-07-13 20:43:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:41,770 INFO L225 Difference]: With dead ends: 29955 [2021-07-13 20:43:41,771 INFO L226 Difference]: Without dead ends: 29951 [2021-07-13 20:43:41,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:43:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2021-07-13 20:43:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 20218. [2021-07-13 20:43:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20218 states, 20217 states have (on average 3.854825147153386) internal successors, (77933), 20217 states have internal predecessors, (77933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20218 states to 20218 states and 77933 transitions. [2021-07-13 20:43:42,611 INFO L78 Accepts]: Start accepts. Automaton has 20218 states and 77933 transitions. Word has length 28 [2021-07-13 20:43:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:42,611 INFO L482 AbstractCegarLoop]: Abstraction has 20218 states and 77933 transitions. [2021-07-13 20:43:42,611 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) [2021-07-13 20:43:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 20218 states and 77933 transitions. [2021-07-13 20:43:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:42,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:42,645 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] [2021-07-13 20:43:42,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4141,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:42,846 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:42,846 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-07-13 20:43:42,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:42,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922571790] [2021-07-13 20:43:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:43,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:43,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922571790] [2021-07-13 20:43:43,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922571790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:43,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121876336] [2021-07-13 20:43:43,007 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 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 [2021-07-13 20:43:43,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:43,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:43:43,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121876336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:43,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:43,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:43:43,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808603576] [2021-07-13 20:43:43,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:43:43,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:43:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:43:43,094 INFO L87 Difference]: Start difference. First operand 20218 states and 77933 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) [2021-07-13 20:43:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:43,370 INFO L93 Difference]: Finished difference Result 25214 states and 93817 transitions. [2021-07-13 20:43:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:43:43,371 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 [2021-07-13 20:43:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:43,450 INFO L225 Difference]: With dead ends: 25214 [2021-07-13 20:43:43,450 INFO L226 Difference]: Without dead ends: 25214 [2021-07-13 20:43:43,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25214 states. [2021-07-13 20:43:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25214 to 20528. [2021-07-13 20:43:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20528 states, 20527 states have (on average 3.8459589808544843) internal successors, (78946), 20527 states have internal predecessors, (78946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20528 states to 20528 states and 78946 transitions. [2021-07-13 20:43:43,957 INFO L78 Accepts]: Start accepts. Automaton has 20528 states and 78946 transitions. Word has length 28 [2021-07-13 20:43:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:43,957 INFO L482 AbstractCegarLoop]: Abstraction has 20528 states and 78946 transitions. [2021-07-13 20:43:43,957 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) [2021-07-13 20:43:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 20528 states and 78946 transitions. [2021-07-13 20:43:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:43,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:43,992 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] [2021-07-13 20:43:44,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4142 [2021-07-13 20:43:44,192 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-07-13 20:43:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:44,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301424997] [2021-07-13 20:43:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:44,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301424997] [2021-07-13 20:43:44,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301424997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98253732] [2021-07-13 20:43:44,231 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 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 [2021-07-13 20:43:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:44,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98253732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:44,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:44,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:43:44,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528710906] [2021-07-13 20:43:44,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:44,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:44,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:44,334 INFO L87 Difference]: Start difference. First operand 20528 states and 78946 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) [2021-07-13 20:43:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:45,289 INFO L93 Difference]: Finished difference Result 30964 states and 113417 transitions. [2021-07-13 20:43:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:43:45,290 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 [2021-07-13 20:43:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:45,387 INFO L225 Difference]: With dead ends: 30964 [2021-07-13 20:43:45,387 INFO L226 Difference]: Without dead ends: 30964 [2021-07-13 20:43:45,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:43:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30964 states. [2021-07-13 20:43:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30964 to 22146. [2021-07-13 20:43:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22146 states, 22145 states have (on average 3.8581169564235718) internal successors, (85438), 22145 states have internal predecessors, (85438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22146 states to 22146 states and 85438 transitions. [2021-07-13 20:43:46,067 INFO L78 Accepts]: Start accepts. Automaton has 22146 states and 85438 transitions. Word has length 28 [2021-07-13 20:43:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:46,067 INFO L482 AbstractCegarLoop]: Abstraction has 22146 states and 85438 transitions. [2021-07-13 20:43:46,067 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) [2021-07-13 20:43:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 22146 states and 85438 transitions. [2021-07-13 20:43:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:46,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:46,110 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] [2021-07-13 20:43:46,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4143,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:46,311 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:46,311 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-07-13 20:43:46,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:46,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932990799] [2021-07-13 20:43:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:46,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:46,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932990799] [2021-07-13 20:43:46,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932990799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:46,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832111213] [2021-07-13 20:43:46,350 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 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 [2021-07-13 20:43:46,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:43:46,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832111213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:46,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:46,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:43:46,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918748512] [2021-07-13 20:43:46,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:46,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:46,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:46,435 INFO L87 Difference]: Start difference. First operand 22146 states and 85438 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) [2021-07-13 20:43:47,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:47,355 INFO L93 Difference]: Finished difference Result 29203 states and 108883 transitions. [2021-07-13 20:43:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:43:47,356 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 [2021-07-13 20:43:47,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:47,460 INFO L225 Difference]: With dead ends: 29203 [2021-07-13 20:43:47,460 INFO L226 Difference]: Without dead ends: 29191 [2021-07-13 20:43:47,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:43:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2021-07-13 20:43:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 22298. [2021-07-13 20:43:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22298 states, 22297 states have (on average 3.8527156119657353) internal successors, (85904), 22297 states have internal predecessors, (85904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22298 states to 22298 states and 85904 transitions. [2021-07-13 20:43:48,211 INFO L78 Accepts]: Start accepts. Automaton has 22298 states and 85904 transitions. Word has length 28 [2021-07-13 20:43:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:48,212 INFO L482 AbstractCegarLoop]: Abstraction has 22298 states and 85904 transitions. [2021-07-13 20:43:48,212 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) [2021-07-13 20:43:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 22298 states and 85904 transitions. [2021-07-13 20:43:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:48,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:48,255 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] [2021-07-13 20:43:48,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-07-13 20:43:48,456 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-07-13 20:43:48,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:48,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307301797] [2021-07-13 20:43:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:48,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:48,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307301797] [2021-07-13 20:43:48,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307301797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:48,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282353141] [2021-07-13 20:43:48,486 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 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 [2021-07-13 20:43:48,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:48,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:48,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:43:48,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:48,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282353141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:48,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:48,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:43:48,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588873662] [2021-07-13 20:43:48,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:43:48,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:48,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:43:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:43:48,573 INFO L87 Difference]: Start difference. First operand 22298 states and 85904 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) [2021-07-13 20:43:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:48,983 INFO L93 Difference]: Finished difference Result 25557 states and 96861 transitions. [2021-07-13 20:43:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:43:48,983 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 [2021-07-13 20:43:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:49,069 INFO L225 Difference]: With dead ends: 25557 [2021-07-13 20:43:49,069 INFO L226 Difference]: Without dead ends: 25557 [2021-07-13 20:43:49,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:43:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25557 states. [2021-07-13 20:43:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25557 to 23101. [2021-07-13 20:43:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23101 states, 23100 states have (on average 3.847748917748918) internal successors, (88883), 23100 states have internal predecessors, (88883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23101 states to 23101 states and 88883 transitions. [2021-07-13 20:43:49,817 INFO L78 Accepts]: Start accepts. Automaton has 23101 states and 88883 transitions. Word has length 28 [2021-07-13 20:43:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:49,818 INFO L482 AbstractCegarLoop]: Abstraction has 23101 states and 88883 transitions. [2021-07-13 20:43:49,818 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) [2021-07-13 20:43:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 23101 states and 88883 transitions. [2021-07-13 20:43:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:49,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:49,854 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] [2021-07-13 20:43:50,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4145 [2021-07-13 20:43:50,055 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:50,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-07-13 20:43:50,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:50,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190641381] [2021-07-13 20:43:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:50,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:50,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190641381] [2021-07-13 20:43:50,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190641381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138913949] [2021-07-13 20:43:50,106 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 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 [2021-07-13 20:43:50,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:50,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:50,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:50,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:50,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138913949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:50,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:43:50,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127958033] [2021-07-13 20:43:50,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:50,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:50,198 INFO L87 Difference]: Start difference. First operand 23101 states and 88883 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) [2021-07-13 20:43:50,742 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:43:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:51,119 INFO L93 Difference]: Finished difference Result 30944 states and 114247 transitions. [2021-07-13 20:43:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:43:51,119 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 [2021-07-13 20:43:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:51,225 INFO L225 Difference]: With dead ends: 30944 [2021-07-13 20:43:51,225 INFO L226 Difference]: Without dead ends: 30944 [2021-07-13 20:43:51,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 543.7ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:43:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30944 states. [2021-07-13 20:43:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30944 to 24307. [2021-07-13 20:43:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24307 states, 24306 states have (on average 3.8156010861515677) internal successors, (92742), 24306 states have internal predecessors, (92742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24307 states to 24307 states and 92742 transitions. [2021-07-13 20:43:52,071 INFO L78 Accepts]: Start accepts. Automaton has 24307 states and 92742 transitions. Word has length 28 [2021-07-13 20:43:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:52,071 INFO L482 AbstractCegarLoop]: Abstraction has 24307 states and 92742 transitions. [2021-07-13 20:43:52,071 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) [2021-07-13 20:43:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 24307 states and 92742 transitions. [2021-07-13 20:43:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:52,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:52,119 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] [2021-07-13 20:43:52,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4146,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:52,320 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-07-13 20:43:52,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:52,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726510129] [2021-07-13 20:43:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:52,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:52,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726510129] [2021-07-13 20:43:52,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726510129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:52,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113292757] [2021-07-13 20:43:52,357 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 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 [2021-07-13 20:43:52,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:43:52,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:52,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:52,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:52,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113292757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:52,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:52,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:52,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982017789] [2021-07-13 20:43:52,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:52,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:52,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:52,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:52,447 INFO L87 Difference]: Start difference. First operand 24307 states and 92742 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) [2021-07-13 20:43:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:53,270 INFO L93 Difference]: Finished difference Result 30042 states and 111856 transitions. [2021-07-13 20:43:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:43:53,270 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 [2021-07-13 20:43:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:53,360 INFO L225 Difference]: With dead ends: 30042 [2021-07-13 20:43:53,360 INFO L226 Difference]: Without dead ends: 30034 [2021-07-13 20:43:53,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:43:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30034 states. [2021-07-13 20:43:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30034 to 24129. [2021-07-13 20:43:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24129 states, 24128 states have (on average 3.821742374005305) internal successors, (92211), 24128 states have internal predecessors, (92211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24129 states to 24129 states and 92211 transitions. [2021-07-13 20:43:54,124 INFO L78 Accepts]: Start accepts. Automaton has 24129 states and 92211 transitions. Word has length 28 [2021-07-13 20:43:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:54,124 INFO L482 AbstractCegarLoop]: Abstraction has 24129 states and 92211 transitions. [2021-07-13 20:43:54,124 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) [2021-07-13 20:43:54,124 INFO L276 IsEmpty]: Start isEmpty. Operand 24129 states and 92211 transitions. [2021-07-13 20:43:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:54,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:54,171 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] [2021-07-13 20:43:54,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4147,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:54,371 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:54,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-07-13 20:43:54,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:54,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727787280] [2021-07-13 20:43:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:54,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:54,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727787280] [2021-07-13 20:43:54,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727787280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:54,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788043414] [2021-07-13 20:43:54,405 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 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 [2021-07-13 20:43:54,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:54,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:54,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:43:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:54,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788043414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:54,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:54,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:54,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291893261] [2021-07-13 20:43:54,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:54,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:54,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:54,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:54,500 INFO L87 Difference]: Start difference. First operand 24129 states and 92211 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) [2021-07-13 20:43:54,953 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:43:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:55,455 INFO L93 Difference]: Finished difference Result 31875 states and 117476 transitions. [2021-07-13 20:43:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:43:55,455 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 [2021-07-13 20:43:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:55,696 INFO L225 Difference]: With dead ends: 31875 [2021-07-13 20:43:55,696 INFO L226 Difference]: Without dead ends: 31875 [2021-07-13 20:43:55,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 551.4ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:43:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31875 states. [2021-07-13 20:43:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31875 to 25163. [2021-07-13 20:43:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25163 states, 25162 states have (on average 3.797631348859391) internal successors, (95556), 25162 states have internal predecessors, (95556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:56,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25163 states to 25163 states and 95556 transitions. [2021-07-13 20:43:56,399 INFO L78 Accepts]: Start accepts. Automaton has 25163 states and 95556 transitions. Word has length 28 [2021-07-13 20:43:56,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:56,399 INFO L482 AbstractCegarLoop]: Abstraction has 25163 states and 95556 transitions. [2021-07-13 20:43:56,399 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) [2021-07-13 20:43:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 25163 states and 95556 transitions. [2021-07-13 20:43:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:56,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:56,571 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] [2021-07-13 20:43:56,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:56,794 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:56,794 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-07-13 20:43:56,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:56,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977231891] [2021-07-13 20:43:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:56,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:56,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977231891] [2021-07-13 20:43:56,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977231891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:56,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957484980] [2021-07-13 20:43:56,838 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 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 [2021-07-13 20:43:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:56,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957484980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:56,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:56,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:43:56,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225212284] [2021-07-13 20:43:56,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:56,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:56,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:56,914 INFO L87 Difference]: Start difference. First operand 25163 states and 95556 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) [2021-07-13 20:43:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:57,434 INFO L93 Difference]: Finished difference Result 30826 states and 116166 transitions. [2021-07-13 20:43:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:43:57,439 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 [2021-07-13 20:43:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:57,547 INFO L225 Difference]: With dead ends: 30826 [2021-07-13 20:43:57,547 INFO L226 Difference]: Without dead ends: 30813 [2021-07-13 20:43:57,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:43:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30813 states. [2021-07-13 20:43:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30813 to 29259. [2021-07-13 20:43:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 3.81594777496753) internal successors, (111647), 29258 states have internal predecessors, (111647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 111647 transitions. [2021-07-13 20:43:58,528 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 111647 transitions. Word has length 28 [2021-07-13 20:43:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:58,528 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 111647 transitions. [2021-07-13 20:43:58,528 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) [2021-07-13 20:43:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 111647 transitions. [2021-07-13 20:43:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:43:58,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:58,590 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] [2021-07-13 20:43:58,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4149,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:58,790 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:58,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-07-13 20:43:58,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:58,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150536475] [2021-07-13 20:43:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:58,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150536475] [2021-07-13 20:43:58,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150536475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464752724] [2021-07-13 20:43:58,834 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 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 [2021-07-13 20:43:58,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:58,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:58,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:58,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464752724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:58,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:58,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:43:58,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791657826] [2021-07-13 20:43:58,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:43:58,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:58,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:43:58,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:43:58,914 INFO L87 Difference]: Start difference. First operand 29259 states and 111647 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) [2021-07-13 20:43:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:59,481 INFO L93 Difference]: Finished difference Result 32262 states and 120978 transitions. [2021-07-13 20:43:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:43:59,481 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 [2021-07-13 20:43:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:59,592 INFO L225 Difference]: With dead ends: 32262 [2021-07-13 20:43:59,592 INFO L226 Difference]: Without dead ends: 32262 [2021-07-13 20:43:59,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:43:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32262 states. [2021-07-13 20:44:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32262 to 29004. [2021-07-13 20:44:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29004 states, 29003 states have (on average 3.8122952797986414) internal successors, (110568), 29003 states have internal predecessors, (110568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29004 states to 29004 states and 110568 transitions. [2021-07-13 20:44:00,544 INFO L78 Accepts]: Start accepts. Automaton has 29004 states and 110568 transitions. Word has length 28 [2021-07-13 20:44:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:00,544 INFO L482 AbstractCegarLoop]: Abstraction has 29004 states and 110568 transitions. [2021-07-13 20:44:00,544 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) [2021-07-13 20:44:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 29004 states and 110568 transitions. [2021-07-13 20:44:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:00,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:00,607 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] [2021-07-13 20:44:00,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-07-13 20:44:00,807 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:00,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:00,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-07-13 20:44:00,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:00,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554607108] [2021-07-13 20:44:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:00,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:00,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554607108] [2021-07-13 20:44:00,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554607108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:00,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141508648] [2021-07-13 20:44:00,841 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 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 [2021-07-13 20:44:00,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:44:00,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:00,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:00,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141508648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:00,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:00,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:44:00,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085026275] [2021-07-13 20:44:00,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:00,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:00,936 INFO L87 Difference]: Start difference. First operand 29004 states and 110568 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) [2021-07-13 20:44:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:01,754 INFO L93 Difference]: Finished difference Result 35430 states and 131896 transitions. [2021-07-13 20:44:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:44:01,755 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 [2021-07-13 20:44:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:01,865 INFO L225 Difference]: With dead ends: 35430 [2021-07-13 20:44:01,866 INFO L226 Difference]: Without dead ends: 35422 [2021-07-13 20:44:01,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:44:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-07-13 20:44:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28970. [2021-07-13 20:44:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28970 states, 28969 states have (on average 3.8127308502191997) internal successors, (110451), 28969 states have internal predecessors, (110451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28970 states to 28970 states and 110451 transitions. [2021-07-13 20:44:02,859 INFO L78 Accepts]: Start accepts. Automaton has 28970 states and 110451 transitions. Word has length 28 [2021-07-13 20:44:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:02,859 INFO L482 AbstractCegarLoop]: Abstraction has 28970 states and 110451 transitions. [2021-07-13 20:44:02,859 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) [2021-07-13 20:44:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28970 states and 110451 transitions. [2021-07-13 20:44:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:02,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:02,932 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] [2021-07-13 20:44:03,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4151,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:03,133 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:03,134 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-07-13 20:44:03,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:03,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104534490] [2021-07-13 20:44:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:03,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104534490] [2021-07-13 20:44:03,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104534490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568758341] [2021-07-13 20:44:03,178 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 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 [2021-07-13 20:44:03,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:03,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:03,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:03,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:03,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568758341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:03,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:03,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:44:03,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836950897] [2021-07-13 20:44:03,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:44:03,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:44:03,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:44:03,278 INFO L87 Difference]: Start difference. First operand 28970 states and 110451 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) [2021-07-13 20:44:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:03,950 INFO L93 Difference]: Finished difference Result 31816 states and 119913 transitions. [2021-07-13 20:44:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:44:03,950 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 [2021-07-13 20:44:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:04,066 INFO L225 Difference]: With dead ends: 31816 [2021-07-13 20:44:04,066 INFO L226 Difference]: Without dead ends: 31816 [2021-07-13 20:44:04,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:44:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31816 states. [2021-07-13 20:44:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31816 to 29502. [2021-07-13 20:44:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29502 states, 29501 states have (on average 3.8112267380766753) internal successors, (112435), 29501 states have internal predecessors, (112435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:05,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29502 states to 29502 states and 112435 transitions. [2021-07-13 20:44:05,008 INFO L78 Accepts]: Start accepts. Automaton has 29502 states and 112435 transitions. Word has length 28 [2021-07-13 20:44:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:05,008 INFO L482 AbstractCegarLoop]: Abstraction has 29502 states and 112435 transitions. [2021-07-13 20:44:05,008 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) [2021-07-13 20:44:05,008 INFO L276 IsEmpty]: Start isEmpty. Operand 29502 states and 112435 transitions. [2021-07-13 20:44:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:05,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:05,064 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] [2021-07-13 20:44:05,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4152 [2021-07-13 20:44:05,264 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:05,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-07-13 20:44:05,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:05,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046831473] [2021-07-13 20:44:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:05,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:05,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046831473] [2021-07-13 20:44:05,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046831473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:05,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813418021] [2021-07-13 20:44:05,306 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 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 [2021-07-13 20:44:05,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:44:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813418021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:05,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:05,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:44:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005760711] [2021-07-13 20:44:05,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:05,390 INFO L87 Difference]: Start difference. First operand 29502 states and 112435 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) [2021-07-13 20:44:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:06,203 INFO L93 Difference]: Finished difference Result 36375 states and 135365 transitions. [2021-07-13 20:44:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:44:06,204 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 [2021-07-13 20:44:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:06,331 INFO L225 Difference]: With dead ends: 36375 [2021-07-13 20:44:06,331 INFO L226 Difference]: Without dead ends: 36351 [2021-07-13 20:44:06,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:44:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36351 states. [2021-07-13 20:44:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36351 to 29684. [2021-07-13 20:44:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29684 states, 29683 states have (on average 3.806960212916484) internal successors, (113002), 29683 states have internal predecessors, (113002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29684 states to 29684 states and 113002 transitions. [2021-07-13 20:44:07,340 INFO L78 Accepts]: Start accepts. Automaton has 29684 states and 113002 transitions. Word has length 28 [2021-07-13 20:44:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:07,341 INFO L482 AbstractCegarLoop]: Abstraction has 29684 states and 113002 transitions. [2021-07-13 20:44:07,341 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) [2021-07-13 20:44:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 29684 states and 113002 transitions. [2021-07-13 20:44:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:07,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:07,404 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] [2021-07-13 20:44:07,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4153,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:07,605 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-07-13 20:44:07,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:07,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585234685] [2021-07-13 20:44:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:07,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:07,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585234685] [2021-07-13 20:44:07,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585234685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:07,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68770252] [2021-07-13 20:44:07,659 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 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 [2021-07-13 20:44:07,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:44:07,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:44:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:07,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68770252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:07,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:07,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:44:07,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490680127] [2021-07-13 20:44:07,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:44:07,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:07,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:44:07,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:44:07,739 INFO L87 Difference]: Start difference. First operand 29684 states and 113002 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) [2021-07-13 20:44:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:08,401 INFO L93 Difference]: Finished difference Result 32240 states and 121414 transitions. [2021-07-13 20:44:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:44:08,402 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 [2021-07-13 20:44:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:08,498 INFO L225 Difference]: With dead ends: 32240 [2021-07-13 20:44:08,498 INFO L226 Difference]: Without dead ends: 32240 [2021-07-13 20:44:08,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:44:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32240 states. [2021-07-13 20:44:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32240 to 29610. [2021-07-13 20:44:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29610 states, 29609 states have (on average 3.8078287007328853) internal successors, (112746), 29609 states have internal predecessors, (112746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29610 states to 29610 states and 112746 transitions. [2021-07-13 20:44:09,538 INFO L78 Accepts]: Start accepts. Automaton has 29610 states and 112746 transitions. Word has length 28 [2021-07-13 20:44:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:09,538 INFO L482 AbstractCegarLoop]: Abstraction has 29610 states and 112746 transitions. [2021-07-13 20:44:09,538 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) [2021-07-13 20:44:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29610 states and 112746 transitions. [2021-07-13 20:44:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:09,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:09,609 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] [2021-07-13 20:44:09,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4154 [2021-07-13 20:44:09,810 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:09,810 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-07-13 20:44:09,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:09,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643321180] [2021-07-13 20:44:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:09,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643321180] [2021-07-13 20:44:09,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643321180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011901986] [2021-07-13 20:44:09,852 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 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 [2021-07-13 20:44:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:09,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011901986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:09,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:44:09,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539120896] [2021-07-13 20:44:09,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:44:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:44:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:44:09,938 INFO L87 Difference]: Start difference. First operand 29610 states and 112746 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) [2021-07-13 20:44:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:10,829 INFO L93 Difference]: Finished difference Result 36298 states and 135106 transitions. [2021-07-13 20:44:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:44:10,829 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 [2021-07-13 20:44:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:10,947 INFO L225 Difference]: With dead ends: 36298 [2021-07-13 20:44:10,947 INFO L226 Difference]: Without dead ends: 36258 [2021-07-13 20:44:10,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:44:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36258 states. [2021-07-13 20:44:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36258 to 29776. [2021-07-13 20:44:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29776 states, 29775 states have (on average 3.803761544920235) internal successors, (113257), 29775 states have internal predecessors, (113257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29776 states to 29776 states and 113257 transitions. [2021-07-13 20:44:11,833 INFO L78 Accepts]: Start accepts. Automaton has 29776 states and 113257 transitions. Word has length 28 [2021-07-13 20:44:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:11,833 INFO L482 AbstractCegarLoop]: Abstraction has 29776 states and 113257 transitions. [2021-07-13 20:44:11,833 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) [2021-07-13 20:44:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 29776 states and 113257 transitions. [2021-07-13 20:44:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:12,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:12,083 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] [2021-07-13 20:44:12,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4155 [2021-07-13 20:44:12,283 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:12,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-07-13 20:44:12,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:12,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659226999] [2021-07-13 20:44:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:12,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659226999] [2021-07-13 20:44:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659226999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826014772] [2021-07-13 20:44:12,320 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 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 [2021-07-13 20:44:12,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:12,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:12,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:12,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:12,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826014772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:12,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:12,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:12,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950920022] [2021-07-13 20:44:12,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:12,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:12,461 INFO L87 Difference]: Start difference. First operand 29776 states and 113257 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) [2021-07-13 20:44:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:14,045 INFO L93 Difference]: Finished difference Result 68142 states and 250877 transitions. [2021-07-13 20:44:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:44:14,045 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 [2021-07-13 20:44:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:14,298 INFO L225 Difference]: With dead ends: 68142 [2021-07-13 20:44:14,298 INFO L226 Difference]: Without dead ends: 68142 [2021-07-13 20:44:14,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:44:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68142 states. [2021-07-13 20:44:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68142 to 37503. [2021-07-13 20:44:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37503 states, 37502 states have (on average 3.8855527705189057) internal successors, (145716), 37502 states have internal predecessors, (145716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37503 states to 37503 states and 145716 transitions. [2021-07-13 20:44:16,057 INFO L78 Accepts]: Start accepts. Automaton has 37503 states and 145716 transitions. Word has length 28 [2021-07-13 20:44:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:16,057 INFO L482 AbstractCegarLoop]: Abstraction has 37503 states and 145716 transitions. [2021-07-13 20:44:16,058 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) [2021-07-13 20:44:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 37503 states and 145716 transitions. [2021-07-13 20:44:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:16,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:16,139 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] [2021-07-13 20:44:16,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4156 [2021-07-13 20:44:16,339 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:16,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:16,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-07-13 20:44:16,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:16,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998726204] [2021-07-13 20:44:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:16,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:16,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998726204] [2021-07-13 20:44:16,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998726204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:16,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598293648] [2021-07-13 20:44:16,373 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 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 [2021-07-13 20:44:16,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:44:16,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:16,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598293648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:16,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:16,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:16,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442815575] [2021-07-13 20:44:16,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:16,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:16,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:16,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:16,506 INFO L87 Difference]: Start difference. First operand 37503 states and 145716 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) [2021-07-13 20:44:16,770 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-07-13 20:44:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:18,299 INFO L93 Difference]: Finished difference Result 67515 states and 249216 transitions. [2021-07-13 20:44:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:44:18,300 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 [2021-07-13 20:44:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:18,589 INFO L225 Difference]: With dead ends: 67515 [2021-07-13 20:44:18,589 INFO L226 Difference]: Without dead ends: 67515 [2021-07-13 20:44:18,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 902.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:44:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-07-13 20:44:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 37500. [2021-07-13 20:44:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37500 states, 37499 states have (on average 3.885490279740793) internal successors, (145702), 37499 states have internal predecessors, (145702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37500 states to 37500 states and 145702 transitions. [2021-07-13 20:44:20,435 INFO L78 Accepts]: Start accepts. Automaton has 37500 states and 145702 transitions. Word has length 28 [2021-07-13 20:44:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:20,435 INFO L482 AbstractCegarLoop]: Abstraction has 37500 states and 145702 transitions. [2021-07-13 20:44:20,436 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) [2021-07-13 20:44:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 37500 states and 145702 transitions. [2021-07-13 20:44:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:20,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:20,520 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] [2021-07-13 20:44:20,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:20,720 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-07-13 20:44:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:20,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53825690] [2021-07-13 20:44:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:20,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:20,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53825690] [2021-07-13 20:44:20,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53825690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:20,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580855141] [2021-07-13 20:44:20,754 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 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 [2021-07-13 20:44:20,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:20,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:20,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:20,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580855141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:20,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:20,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:44:20,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025559954] [2021-07-13 20:44:20,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:20,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:20,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:20,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:20,874 INFO L87 Difference]: Start difference. First operand 37500 states and 145702 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) [2021-07-13 20:44:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:22,309 INFO L93 Difference]: Finished difference Result 62937 states and 233716 transitions. [2021-07-13 20:44:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:44:22,309 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 [2021-07-13 20:44:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:22,755 INFO L225 Difference]: With dead ends: 62937 [2021-07-13 20:44:22,756 INFO L226 Difference]: Without dead ends: 62937 [2021-07-13 20:44:22,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 605.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:44:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62937 states. [2021-07-13 20:44:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62937 to 37524. [2021-07-13 20:44:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885830024251792) internal successors, (145808), 37523 states have internal predecessors, (145808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145808 transitions. [2021-07-13 20:44:24,345 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145808 transitions. Word has length 28 [2021-07-13 20:44:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:24,345 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145808 transitions. [2021-07-13 20:44:24,345 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) [2021-07-13 20:44:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145808 transitions. [2021-07-13 20:44:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:24,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:24,420 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] [2021-07-13 20:44:24,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4158,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:24,621 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-07-13 20:44:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:24,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705725064] [2021-07-13 20:44:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:24,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705725064] [2021-07-13 20:44:24,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705725064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508280351] [2021-07-13 20:44:24,887 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 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 [2021-07-13 20:44:24,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:44:24,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:24,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:25,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508280351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:25,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:25,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:44:25,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537296812] [2021-07-13 20:44:25,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:25,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:25,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:25,039 INFO L87 Difference]: Start difference. First operand 37524 states and 145808 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) [2021-07-13 20:44:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:26,408 INFO L93 Difference]: Finished difference Result 62070 states and 231476 transitions. [2021-07-13 20:44:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:44:26,409 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 [2021-07-13 20:44:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:26,645 INFO L225 Difference]: With dead ends: 62070 [2021-07-13 20:44:26,645 INFO L226 Difference]: Without dead ends: 62062 [2021-07-13 20:44:26,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 532.0ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:44:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62062 states. [2021-07-13 20:44:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62062 to 37524. [2021-07-13 20:44:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885670122324974) internal successors, (145802), 37523 states have internal predecessors, (145802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145802 transitions. [2021-07-13 20:44:28,494 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145802 transitions. Word has length 28 [2021-07-13 20:44:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:28,494 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145802 transitions. [2021-07-13 20:44:28,494 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) [2021-07-13 20:44:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145802 transitions. [2021-07-13 20:44:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:28,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:28,570 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] [2021-07-13 20:44:28,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4159,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:28,772 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:28,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:28,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-07-13 20:44:28,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:28,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533187767] [2021-07-13 20:44:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:28,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:28,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533187767] [2021-07-13 20:44:28,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533187767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285269443] [2021-07-13 20:44:28,806 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 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 [2021-07-13 20:44:28,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:44:28,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:28,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:28,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:28,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285269443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:28,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:28,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667912654] [2021-07-13 20:44:28,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:28,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:28,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:28,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:28,941 INFO L87 Difference]: Start difference. First operand 37524 states and 145802 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) [2021-07-13 20:44:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:30,373 INFO L93 Difference]: Finished difference Result 61748 states and 230607 transitions. [2021-07-13 20:44:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:44:30,373 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 [2021-07-13 20:44:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:30,627 INFO L225 Difference]: With dead ends: 61748 [2021-07-13 20:44:30,627 INFO L226 Difference]: Without dead ends: 61748 [2021-07-13 20:44:30,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:44:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61748 states. [2021-07-13 20:44:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61748 to 37532. [2021-07-13 20:44:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.8857477818336843) internal successors, (145836), 37531 states have internal predecessors, (145836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145836 transitions. [2021-07-13 20:44:32,365 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145836 transitions. Word has length 28 [2021-07-13 20:44:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:32,365 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145836 transitions. [2021-07-13 20:44:32,365 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) [2021-07-13 20:44:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145836 transitions. [2021-07-13 20:44:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:32,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:32,446 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] [2021-07-13 20:44:32,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4160 [2021-07-13 20:44:32,646 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-07-13 20:44:32,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:32,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917483711] [2021-07-13 20:44:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:32,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:32,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917483711] [2021-07-13 20:44:32,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917483711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:32,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781692765] [2021-07-13 20:44:32,680 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 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 [2021-07-13 20:44:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:32,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:32,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781692765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:32,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:32,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:32,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017043977] [2021-07-13 20:44:32,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:32,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:32,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:32,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:32,802 INFO L87 Difference]: Start difference. First operand 37532 states and 145836 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) [2021-07-13 20:44:33,341 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:44:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:34,208 INFO L93 Difference]: Finished difference Result 61537 states and 230081 transitions. [2021-07-13 20:44:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:44:34,209 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 [2021-07-13 20:44:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:34,691 INFO L225 Difference]: With dead ends: 61537 [2021-07-13 20:44:34,692 INFO L226 Difference]: Without dead ends: 61529 [2021-07-13 20:44:34,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 728.7ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:44:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61529 states. [2021-07-13 20:44:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61529 to 37532. [2021-07-13 20:44:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.885694492552823) internal successors, (145834), 37531 states have internal predecessors, (145834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145834 transitions. [2021-07-13 20:44:36,429 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145834 transitions. Word has length 28 [2021-07-13 20:44:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:36,429 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145834 transitions. [2021-07-13 20:44:36,429 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) [2021-07-13 20:44:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145834 transitions. [2021-07-13 20:44:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:36,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:36,527 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] [2021-07-13 20:44:36,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4161,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:36,741 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:36,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-07-13 20:44:36,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:36,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761029745] [2021-07-13 20:44:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:36,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:36,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761029745] [2021-07-13 20:44:36,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761029745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:36,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367105472] [2021-07-13 20:44:36,774 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 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 [2021-07-13 20:44:36,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:36,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:36,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:36,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367105472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:36,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:36,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:44:36,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306577351] [2021-07-13 20:44:36,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:36,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:36,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:36,881 INFO L87 Difference]: Start difference. First operand 37532 states and 145834 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) [2021-07-13 20:44:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:38,661 INFO L93 Difference]: Finished difference Result 60940 states and 226561 transitions. [2021-07-13 20:44:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:44:38,661 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 [2021-07-13 20:44:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:38,902 INFO L225 Difference]: With dead ends: 60940 [2021-07-13 20:44:38,902 INFO L226 Difference]: Without dead ends: 60940 [2021-07-13 20:44:38,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:44:38,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60940 states. [2021-07-13 20:44:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60940 to 40347. [2021-07-13 20:44:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40347 states, 40346 states have (on average 3.8897040598820207) internal successors, (156934), 40346 states have internal predecessors, (156934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40347 states to 40347 states and 156934 transitions. [2021-07-13 20:44:40,614 INFO L78 Accepts]: Start accepts. Automaton has 40347 states and 156934 transitions. Word has length 28 [2021-07-13 20:44:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:40,615 INFO L482 AbstractCegarLoop]: Abstraction has 40347 states and 156934 transitions. [2021-07-13 20:44:40,615 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) [2021-07-13 20:44:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 40347 states and 156934 transitions. [2021-07-13 20:44:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:40,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:40,934 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] [2021-07-13 20:44:41,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4162 [2021-07-13 20:44:41,150 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:41,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-07-13 20:44:41,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:41,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251140992] [2021-07-13 20:44:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:41,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:41,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251140992] [2021-07-13 20:44:41,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251140992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:41,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511916649] [2021-07-13 20:44:41,187 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 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 [2021-07-13 20:44:41,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:44:41,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:41,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511916649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:41,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:41,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:44:41,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715857885] [2021-07-13 20:44:41,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:41,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:41,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:41,288 INFO L87 Difference]: Start difference. First operand 40347 states and 156934 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) [2021-07-13 20:44:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:42,568 INFO L93 Difference]: Finished difference Result 60463 states and 225303 transitions. [2021-07-13 20:44:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:44:42,569 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 [2021-07-13 20:44:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:42,813 INFO L225 Difference]: With dead ends: 60463 [2021-07-13 20:44:42,813 INFO L226 Difference]: Without dead ends: 60455 [2021-07-13 20:44:42,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:44:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60455 states. [2021-07-13 20:44:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60455 to 40063. [2021-07-13 20:44:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40063 states, 40062 states have (on average 3.8951125755079627) internal successors, (156046), 40062 states have internal predecessors, (156046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40063 states to 40063 states and 156046 transitions. [2021-07-13 20:44:44,691 INFO L78 Accepts]: Start accepts. Automaton has 40063 states and 156046 transitions. Word has length 28 [2021-07-13 20:44:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:44,691 INFO L482 AbstractCegarLoop]: Abstraction has 40063 states and 156046 transitions. [2021-07-13 20:44:44,692 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) [2021-07-13 20:44:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 40063 states and 156046 transitions. [2021-07-13 20:44:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:44,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:44,777 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] [2021-07-13 20:44:44,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4163,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:44,978 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:44,978 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-07-13 20:44:44,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:44,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391189614] [2021-07-13 20:44:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:45,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:45,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391189614] [2021-07-13 20:44:45,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391189614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:45,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595163079] [2021-07-13 20:44:45,011 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 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 [2021-07-13 20:44:45,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:45,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:45,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:45,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:45,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595163079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:45,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:45,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:44:45,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059828914] [2021-07-13 20:44:45,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:44:45,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:45,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:44:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:44:45,112 INFO L87 Difference]: Start difference. First operand 40063 states and 156046 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) [2021-07-13 20:44:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:46,203 INFO L93 Difference]: Finished difference Result 59012 states and 221313 transitions. [2021-07-13 20:44:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:44:46,203 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 [2021-07-13 20:44:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:46,448 INFO L225 Difference]: With dead ends: 59012 [2021-07-13 20:44:46,448 INFO L226 Difference]: Without dead ends: 58988 [2021-07-13 20:44:46,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:44:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58988 states. [2021-07-13 20:44:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58988 to 39973. [2021-07-13 20:44:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39973 states, 39972 states have (on average 3.8949514660262183) internal successors, (155689), 39972 states have internal predecessors, (155689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39973 states to 39973 states and 155689 transitions. [2021-07-13 20:44:48,269 INFO L78 Accepts]: Start accepts. Automaton has 39973 states and 155689 transitions. Word has length 28 [2021-07-13 20:44:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:48,269 INFO L482 AbstractCegarLoop]: Abstraction has 39973 states and 155689 transitions. [2021-07-13 20:44:48,269 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) [2021-07-13 20:44:48,269 INFO L276 IsEmpty]: Start isEmpty. Operand 39973 states and 155689 transitions. [2021-07-13 20:44:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:48,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:48,362 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] [2021-07-13 20:44:48,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-07-13 20:44:48,563 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-07-13 20:44:48,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:48,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267177952] [2021-07-13 20:44:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:48,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:48,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267177952] [2021-07-13 20:44:48,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267177952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:48,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454603607] [2021-07-13 20:44:48,598 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 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 [2021-07-13 20:44:48,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:44:48,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:48,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:48,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454603607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:48,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652327488] [2021-07-13 20:44:48,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:48,724 INFO L87 Difference]: Start difference. First operand 39973 states and 155689 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) [2021-07-13 20:44:49,833 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-07-13 20:44:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:50,326 INFO L93 Difference]: Finished difference Result 60251 states and 224712 transitions. [2021-07-13 20:44:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:44:50,326 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 [2021-07-13 20:44:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:50,639 INFO L225 Difference]: With dead ends: 60251 [2021-07-13 20:44:50,639 INFO L226 Difference]: Without dead ends: 60251 [2021-07-13 20:44:50,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 930.6ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:44:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60251 states. [2021-07-13 20:44:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60251 to 40069. [2021-07-13 20:44:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40069 states, 40068 states have (on average 3.8934561245882002) internal successors, (156003), 40068 states have internal predecessors, (156003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40069 states to 40069 states and 156003 transitions. [2021-07-13 20:44:52,687 INFO L78 Accepts]: Start accepts. Automaton has 40069 states and 156003 transitions. Word has length 28 [2021-07-13 20:44:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:52,687 INFO L482 AbstractCegarLoop]: Abstraction has 40069 states and 156003 transitions. [2021-07-13 20:44:52,687 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) [2021-07-13 20:44:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 40069 states and 156003 transitions. [2021-07-13 20:44:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:52,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:52,771 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] [2021-07-13 20:44:52,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4165 [2021-07-13 20:44:52,972 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-07-13 20:44:52,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:52,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428617668] [2021-07-13 20:44:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:53,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:53,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428617668] [2021-07-13 20:44:53,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428617668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:53,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967899526] [2021-07-13 20:44:53,007 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 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 [2021-07-13 20:44:53,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:44:53,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:53,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:53,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967899526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:53,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:53,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:44:53,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725263672] [2021-07-13 20:44:53,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:44:53,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:53,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:44:53,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:44:53,127 INFO L87 Difference]: Start difference. First operand 40069 states and 156003 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) [2021-07-13 20:44:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:54,394 INFO L93 Difference]: Finished difference Result 59938 states and 223824 transitions. [2021-07-13 20:44:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:44:54,394 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 [2021-07-13 20:44:54,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:54,625 INFO L225 Difference]: With dead ends: 59938 [2021-07-13 20:44:54,625 INFO L226 Difference]: Without dead ends: 59930 [2021-07-13 20:44:54,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:44:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59930 states. [2021-07-13 20:44:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59930 to 40001. [2021-07-13 20:44:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40001 states, 40000 states have (on average 3.894775) internal successors, (155791), 40000 states have internal predecessors, (155791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40001 states to 40001 states and 155791 transitions. [2021-07-13 20:44:56,418 INFO L78 Accepts]: Start accepts. Automaton has 40001 states and 155791 transitions. Word has length 28 [2021-07-13 20:44:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:56,418 INFO L482 AbstractCegarLoop]: Abstraction has 40001 states and 155791 transitions. [2021-07-13 20:44:56,418 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) [2021-07-13 20:44:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 40001 states and 155791 transitions. [2021-07-13 20:44:56,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:44:56,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:56,495 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] [2021-07-13 20:44:56,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4166 [2021-07-13 20:44:56,695 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:56,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-07-13 20:44:56,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:56,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232936723] [2021-07-13 20:44:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:56,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232936723] [2021-07-13 20:44:56,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232936723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590298973] [2021-07-13 20:44:56,729 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 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 [2021-07-13 20:44:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:44:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:56,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590298973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:56,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:56,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:44:56,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133169396] [2021-07-13 20:44:56,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:44:56,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:56,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:44:56,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:44:56,838 INFO L87 Difference]: Start difference. First operand 40001 states and 155791 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) [2021-07-13 20:44:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:57,912 INFO L93 Difference]: Finished difference Result 58669 states and 220313 transitions. [2021-07-13 20:44:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:44:57,913 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 [2021-07-13 20:44:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:58,136 INFO L225 Difference]: With dead ends: 58669 [2021-07-13 20:44:58,136 INFO L226 Difference]: Without dead ends: 58645 [2021-07-13 20:44:58,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:44:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58645 states. [2021-07-13 20:44:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58645 to 39977. [2021-07-13 20:44:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39977 states, 39976 states have (on average 3.894911947168301) internal successors, (155703), 39976 states have internal predecessors, (155703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39977 states to 39977 states and 155703 transitions. [2021-07-13 20:45:00,021 INFO L78 Accepts]: Start accepts. Automaton has 39977 states and 155703 transitions. Word has length 28 [2021-07-13 20:45:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:00,022 INFO L482 AbstractCegarLoop]: Abstraction has 39977 states and 155703 transitions. [2021-07-13 20:45:00,022 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) [2021-07-13 20:45:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 39977 states and 155703 transitions. [2021-07-13 20:45:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:00,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:00,110 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] [2021-07-13 20:45:00,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-07-13 20:45:00,311 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-07-13 20:45:00,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:00,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611568155] [2021-07-13 20:45:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:00,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:00,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611568155] [2021-07-13 20:45:00,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611568155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:00,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146482788] [2021-07-13 20:45:00,350 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 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 [2021-07-13 20:45:00,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:00,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:00,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146482788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:00,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:00,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:00,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999568678] [2021-07-13 20:45:00,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:00,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:00,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:00,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:00,448 INFO L87 Difference]: Start difference. First operand 39977 states and 155703 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) [2021-07-13 20:45:01,349 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 20:45:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:02,217 INFO L93 Difference]: Finished difference Result 61863 states and 229407 transitions. [2021-07-13 20:45:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:45:02,217 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 [2021-07-13 20:45:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:02,672 INFO L225 Difference]: With dead ends: 61863 [2021-07-13 20:45:02,672 INFO L226 Difference]: Without dead ends: 61863 [2021-07-13 20:45:02,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1015.9ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:45:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61863 states. [2021-07-13 20:45:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61863 to 44335. [2021-07-13 20:45:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44335 states, 44334 states have (on average 3.8447692515902014) internal successors, (170454), 44334 states have internal predecessors, (170454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44335 states to 44335 states and 170454 transitions. [2021-07-13 20:45:04,473 INFO L78 Accepts]: Start accepts. Automaton has 44335 states and 170454 transitions. Word has length 28 [2021-07-13 20:45:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:04,473 INFO L482 AbstractCegarLoop]: Abstraction has 44335 states and 170454 transitions. [2021-07-13 20:45:04,473 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) [2021-07-13 20:45:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 44335 states and 170454 transitions. [2021-07-13 20:45:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:04,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:04,839 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] [2021-07-13 20:45:05,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4168,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:05,053 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:05,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-07-13 20:45:05,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:05,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691261888] [2021-07-13 20:45:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:05,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691261888] [2021-07-13 20:45:05,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691261888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901015099] [2021-07-13 20:45:05,092 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 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 [2021-07-13 20:45:05,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:05,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:05,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:05,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901015099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:05,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:05,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:05,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395020367] [2021-07-13 20:45:05,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:05,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:05,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:05,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:05,187 INFO L87 Difference]: Start difference. First operand 44335 states and 170454 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) [2021-07-13 20:45:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:06,760 INFO L93 Difference]: Finished difference Result 61094 states and 227301 transitions. [2021-07-13 20:45:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:45:06,761 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 [2021-07-13 20:45:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:06,994 INFO L225 Difference]: With dead ends: 61094 [2021-07-13 20:45:06,994 INFO L226 Difference]: Without dead ends: 61086 [2021-07-13 20:45:06,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:45:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-07-13 20:45:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 43181. [2021-07-13 20:45:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43181 states, 43180 states have (on average 3.8640805928670683) internal successors, (166851), 43180 states have internal predecessors, (166851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43181 states to 43181 states and 166851 transitions. [2021-07-13 20:45:08,904 INFO L78 Accepts]: Start accepts. Automaton has 43181 states and 166851 transitions. Word has length 28 [2021-07-13 20:45:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:08,904 INFO L482 AbstractCegarLoop]: Abstraction has 43181 states and 166851 transitions. [2021-07-13 20:45:08,904 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) [2021-07-13 20:45:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 43181 states and 166851 transitions. [2021-07-13 20:45:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:08,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:08,989 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] [2021-07-13 20:45:09,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4169,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:09,190 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:09,190 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-07-13 20:45:09,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:09,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464921451] [2021-07-13 20:45:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:09,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:09,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464921451] [2021-07-13 20:45:09,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464921451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:09,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397164535] [2021-07-13 20:45:09,228 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 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 [2021-07-13 20:45:09,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:09,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:09,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397164535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:09,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:09,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:09,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144579587] [2021-07-13 20:45:09,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:09,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:09,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:09,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:09,318 INFO L87 Difference]: Start difference. First operand 43181 states and 166851 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) [2021-07-13 20:45:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:10,704 INFO L93 Difference]: Finished difference Result 59433 states and 222664 transitions. [2021-07-13 20:45:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:45:10,704 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 [2021-07-13 20:45:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:10,963 INFO L225 Difference]: With dead ends: 59433 [2021-07-13 20:45:10,963 INFO L226 Difference]: Without dead ends: 59409 [2021-07-13 20:45:10,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 763.7ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:45:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59409 states. [2021-07-13 20:45:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59409 to 43201. [2021-07-13 20:45:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43201 states, 43200 states have (on average 3.861782407407407) internal successors, (166829), 43200 states have internal predecessors, (166829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43201 states to 43201 states and 166829 transitions. [2021-07-13 20:45:12,766 INFO L78 Accepts]: Start accepts. Automaton has 43201 states and 166829 transitions. Word has length 28 [2021-07-13 20:45:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:12,766 INFO L482 AbstractCegarLoop]: Abstraction has 43201 states and 166829 transitions. [2021-07-13 20:45:12,766 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) [2021-07-13 20:45:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 43201 states and 166829 transitions. [2021-07-13 20:45:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:12,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:12,858 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] [2021-07-13 20:45:13,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:13,058 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-07-13 20:45:13,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:13,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224340682] [2021-07-13 20:45:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:13,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:13,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224340682] [2021-07-13 20:45:13,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224340682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:13,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480382943] [2021-07-13 20:45:13,104 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 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 [2021-07-13 20:45:13,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:13,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:13,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:13,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480382943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:13,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:13,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:45:13,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185408771] [2021-07-13 20:45:13,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:45:13,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:13,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:45:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:45:13,199 INFO L87 Difference]: Start difference. First operand 43201 states and 166829 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) [2021-07-13 20:45:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:14,560 INFO L93 Difference]: Finished difference Result 60686 states and 226187 transitions. [2021-07-13 20:45:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:45:14,560 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 [2021-07-13 20:45:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:15,027 INFO L225 Difference]: With dead ends: 60686 [2021-07-13 20:45:15,028 INFO L226 Difference]: Without dead ends: 60646 [2021-07-13 20:45:15,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 727.4ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:45:15,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60646 states. [2021-07-13 20:45:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60646 to 43335. [2021-07-13 20:45:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43335 states, 43334 states have (on average 3.8610790603221488) internal successors, (167316), 43334 states have internal predecessors, (167316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43335 states to 43335 states and 167316 transitions. [2021-07-13 20:45:16,688 INFO L78 Accepts]: Start accepts. Automaton has 43335 states and 167316 transitions. Word has length 28 [2021-07-13 20:45:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:16,689 INFO L482 AbstractCegarLoop]: Abstraction has 43335 states and 167316 transitions. [2021-07-13 20:45:16,689 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) [2021-07-13 20:45:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 43335 states and 167316 transitions. [2021-07-13 20:45:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:16,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:16,788 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] [2021-07-13 20:45:16,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4171 [2021-07-13 20:45:16,989 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:16,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-07-13 20:45:16,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:16,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300924293] [2021-07-13 20:45:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:17,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:17,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300924293] [2021-07-13 20:45:17,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300924293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:17,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310874306] [2021-07-13 20:45:17,028 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 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 [2021-07-13 20:45:17,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:17,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:17,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310874306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:17,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:17,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:17,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012755551] [2021-07-13 20:45:17,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:17,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:17,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:17,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:17,158 INFO L87 Difference]: Start difference. First operand 43335 states and 167316 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) [2021-07-13 20:45:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:19,146 INFO L93 Difference]: Finished difference Result 59923 states and 223885 transitions. [2021-07-13 20:45:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:45:19,146 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 [2021-07-13 20:45:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:19,392 INFO L225 Difference]: With dead ends: 59923 [2021-07-13 20:45:19,392 INFO L226 Difference]: Without dead ends: 59923 [2021-07-13 20:45:19,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 865.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:45:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59923 states. [2021-07-13 20:45:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59923 to 44240. [2021-07-13 20:45:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44240 states, 44239 states have (on average 3.851511110106467) internal successors, (170387), 44239 states have internal predecessors, (170387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44240 states to 44240 states and 170387 transitions. [2021-07-13 20:45:21,026 INFO L78 Accepts]: Start accepts. Automaton has 44240 states and 170387 transitions. Word has length 28 [2021-07-13 20:45:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:21,027 INFO L482 AbstractCegarLoop]: Abstraction has 44240 states and 170387 transitions. [2021-07-13 20:45:21,027 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) [2021-07-13 20:45:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 44240 states and 170387 transitions. [2021-07-13 20:45:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:21,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:21,338 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] [2021-07-13 20:45:21,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4172,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:21,553 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-07-13 20:45:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:21,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658032712] [2021-07-13 20:45:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:21,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:21,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658032712] [2021-07-13 20:45:21,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658032712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:21,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221656457] [2021-07-13 20:45:21,592 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 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 [2021-07-13 20:45:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:21,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:21,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:21,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221656457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:21,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:21,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182314428] [2021-07-13 20:45:21,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:21,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:21,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:21,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:21,717 INFO L87 Difference]: Start difference. First operand 44240 states and 170387 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) [2021-07-13 20:45:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:23,268 INFO L93 Difference]: Finished difference Result 59425 states and 222490 transitions. [2021-07-13 20:45:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:45:23,269 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 [2021-07-13 20:45:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:23,493 INFO L225 Difference]: With dead ends: 59425 [2021-07-13 20:45:23,493 INFO L226 Difference]: Without dead ends: 59417 [2021-07-13 20:45:23,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:45:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59417 states. [2021-07-13 20:45:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59417 to 44164. [2021-07-13 20:45:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44164 states, 44163 states have (on average 3.8527953264044563) internal successors, (170151), 44163 states have internal predecessors, (170151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44164 states to 44164 states and 170151 transitions. [2021-07-13 20:45:25,354 INFO L78 Accepts]: Start accepts. Automaton has 44164 states and 170151 transitions. Word has length 28 [2021-07-13 20:45:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:25,354 INFO L482 AbstractCegarLoop]: Abstraction has 44164 states and 170151 transitions. [2021-07-13 20:45:25,354 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) [2021-07-13 20:45:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 44164 states and 170151 transitions. [2021-07-13 20:45:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:25,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:25,448 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] [2021-07-13 20:45:25,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4173 [2021-07-13 20:45:25,653 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:25,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-07-13 20:45:25,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:25,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120322988] [2021-07-13 20:45:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:25,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:25,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120322988] [2021-07-13 20:45:25,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120322988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:25,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085431592] [2021-07-13 20:45:25,705 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 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 [2021-07-13 20:45:25,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:25,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:25,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:25,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085431592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:25,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:25,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:25,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247700353] [2021-07-13 20:45:25,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:25,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:25,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:25,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:25,814 INFO L87 Difference]: Start difference. First operand 44164 states and 170151 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) [2021-07-13 20:45:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:27,155 INFO L93 Difference]: Finished difference Result 58902 states and 221244 transitions. [2021-07-13 20:45:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:45:27,155 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 [2021-07-13 20:45:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:27,369 INFO L225 Difference]: With dead ends: 58902 [2021-07-13 20:45:27,370 INFO L226 Difference]: Without dead ends: 58878 [2021-07-13 20:45:27,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:45:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58878 states. [2021-07-13 20:45:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58878 to 44150. [2021-07-13 20:45:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44150 states, 44149 states have (on average 3.8527712971981245) internal successors, (170096), 44149 states have internal predecessors, (170096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44150 states to 44150 states and 170096 transitions. [2021-07-13 20:45:29,267 INFO L78 Accepts]: Start accepts. Automaton has 44150 states and 170096 transitions. Word has length 28 [2021-07-13 20:45:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:29,267 INFO L482 AbstractCegarLoop]: Abstraction has 44150 states and 170096 transitions. [2021-07-13 20:45:29,267 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) [2021-07-13 20:45:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 44150 states and 170096 transitions. [2021-07-13 20:45:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:29,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:29,381 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] [2021-07-13 20:45:29,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4174,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:29,608 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:29,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-07-13 20:45:29,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:29,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121332025] [2021-07-13 20:45:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:29,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:29,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121332025] [2021-07-13 20:45:29,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121332025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:29,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015822999] [2021-07-13 20:45:29,661 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 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 [2021-07-13 20:45:29,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:29,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:29,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015822999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:29,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:29,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:45:29,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355419204] [2021-07-13 20:45:29,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:45:29,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:29,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:45:29,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:45:29,770 INFO L87 Difference]: Start difference. First operand 44150 states and 170096 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) [2021-07-13 20:45:30,358 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:45:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:31,106 INFO L93 Difference]: Finished difference Result 58684 states and 220551 transitions. [2021-07-13 20:45:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:45:31,107 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 [2021-07-13 20:45:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:31,553 INFO L225 Difference]: With dead ends: 58684 [2021-07-13 20:45:31,553 INFO L226 Difference]: Without dead ends: 58644 [2021-07-13 20:45:31,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:45:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58644 states. [2021-07-13 20:45:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58644 to 44499. [2021-07-13 20:45:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44499 states, 44498 states have (on average 3.854667625511259) internal successors, (171525), 44498 states have internal predecessors, (171525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44499 states to 44499 states and 171525 transitions. [2021-07-13 20:45:33,090 INFO L78 Accepts]: Start accepts. Automaton has 44499 states and 171525 transitions. Word has length 28 [2021-07-13 20:45:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:33,090 INFO L482 AbstractCegarLoop]: Abstraction has 44499 states and 171525 transitions. [2021-07-13 20:45:33,090 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) [2021-07-13 20:45:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 44499 states and 171525 transitions. [2021-07-13 20:45:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:33,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:33,177 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] [2021-07-13 20:45:33,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4175 [2021-07-13 20:45:33,377 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-07-13 20:45:33,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:33,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131383477] [2021-07-13 20:45:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:33,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:33,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131383477] [2021-07-13 20:45:33,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131383477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:33,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881671327] [2021-07-13 20:45:33,419 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 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 [2021-07-13 20:45:33,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:33,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:33,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:33,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:33,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881671327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:33,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:33,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:33,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695644835] [2021-07-13 20:45:33,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:33,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:33,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:33,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:33,537 INFO L87 Difference]: Start difference. First operand 44499 states and 171525 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) [2021-07-13 20:45:33,884 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-07-13 20:45:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:35,298 INFO L93 Difference]: Finished difference Result 71216 states and 265043 transitions. [2021-07-13 20:45:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:45:35,298 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 [2021-07-13 20:45:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:35,570 INFO L225 Difference]: With dead ends: 71216 [2021-07-13 20:45:35,571 INFO L226 Difference]: Without dead ends: 71216 [2021-07-13 20:45:35,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:45:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71216 states. [2021-07-13 20:45:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71216 to 45665. [2021-07-13 20:45:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45665 states, 45664 states have (on average 3.8691310441485633) internal successors, (176680), 45664 states have internal predecessors, (176680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45665 states to 45665 states and 176680 transitions. [2021-07-13 20:45:37,534 INFO L78 Accepts]: Start accepts. Automaton has 45665 states and 176680 transitions. Word has length 28 [2021-07-13 20:45:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:37,534 INFO L482 AbstractCegarLoop]: Abstraction has 45665 states and 176680 transitions. [2021-07-13 20:45:37,535 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) [2021-07-13 20:45:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45665 states and 176680 transitions. [2021-07-13 20:45:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:37,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:37,634 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] [2021-07-13 20:45:37,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4176,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:37,834 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-07-13 20:45:37,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:37,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782192846] [2021-07-13 20:45:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:37,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:37,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782192846] [2021-07-13 20:45:37,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782192846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:37,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770840185] [2021-07-13 20:45:37,872 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 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 [2021-07-13 20:45:37,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:37,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:37,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770840185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:37,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:37,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:37,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673510839] [2021-07-13 20:45:37,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:37,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:37,992 INFO L87 Difference]: Start difference. First operand 45665 states and 176680 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) [2021-07-13 20:45:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:39,475 INFO L93 Difference]: Finished difference Result 65301 states and 246293 transitions. [2021-07-13 20:45:39,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:45:39,475 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 [2021-07-13 20:45:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:39,729 INFO L225 Difference]: With dead ends: 65301 [2021-07-13 20:45:39,729 INFO L226 Difference]: Without dead ends: 65301 [2021-07-13 20:45:39,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:45:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65301 states. [2021-07-13 20:45:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65301 to 45695. [2021-07-13 20:45:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45695 states, 45694 states have (on average 3.8689324637808027) internal successors, (176787), 45694 states have internal predecessors, (176787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45695 states to 45695 states and 176787 transitions. [2021-07-13 20:45:41,595 INFO L78 Accepts]: Start accepts. Automaton has 45695 states and 176787 transitions. Word has length 28 [2021-07-13 20:45:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:41,595 INFO L482 AbstractCegarLoop]: Abstraction has 45695 states and 176787 transitions. [2021-07-13 20:45:41,595 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) [2021-07-13 20:45:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 45695 states and 176787 transitions. [2021-07-13 20:45:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:41,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:41,700 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] [2021-07-13 20:45:41,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-07-13 20:45:41,901 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-07-13 20:45:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:41,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468535379] [2021-07-13 20:45:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:41,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:41,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468535379] [2021-07-13 20:45:41,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468535379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:41,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681267135] [2021-07-13 20:45:41,939 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 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 [2021-07-13 20:45:41,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:41,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:41,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:42,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681267135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:42,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:42,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:42,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757043102] [2021-07-13 20:45:42,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:42,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:42,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:42,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:42,064 INFO L87 Difference]: Start difference. First operand 45695 states and 176787 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) [2021-07-13 20:45:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:44,143 INFO L93 Difference]: Finished difference Result 66159 states and 248729 transitions. [2021-07-13 20:45:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:45:44,143 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 [2021-07-13 20:45:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:44,394 INFO L225 Difference]: With dead ends: 66159 [2021-07-13 20:45:44,394 INFO L226 Difference]: Without dead ends: 66159 [2021-07-13 20:45:44,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 918.1ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:45:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66159 states. [2021-07-13 20:45:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66159 to 45959. [2021-07-13 20:45:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45959 states, 45958 states have (on average 3.8653770834239958) internal successors, (177645), 45958 states have internal predecessors, (177645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45959 states to 45959 states and 177645 transitions. [2021-07-13 20:45:46,292 INFO L78 Accepts]: Start accepts. Automaton has 45959 states and 177645 transitions. Word has length 28 [2021-07-13 20:45:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:46,293 INFO L482 AbstractCegarLoop]: Abstraction has 45959 states and 177645 transitions. [2021-07-13 20:45:46,293 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) [2021-07-13 20:45:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 45959 states and 177645 transitions. [2021-07-13 20:45:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:46,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:46,388 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] [2021-07-13 20:45:46,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4178 [2021-07-13 20:45:46,589 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-07-13 20:45:46,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:46,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334098258] [2021-07-13 20:45:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:46,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:46,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334098258] [2021-07-13 20:45:46,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334098258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:46,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025348202] [2021-07-13 20:45:46,627 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 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 [2021-07-13 20:45:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:46,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:46,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025348202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:46,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:46,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:45:46,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284698128] [2021-07-13 20:45:46,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:45:46,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:45:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:45:46,749 INFO L87 Difference]: Start difference. First operand 45959 states and 177645 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) [2021-07-13 20:45:47,293 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 20:45:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:48,552 INFO L93 Difference]: Finished difference Result 65371 states and 246494 transitions. [2021-07-13 20:45:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:45:48,553 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 [2021-07-13 20:45:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:48,851 INFO L225 Difference]: With dead ends: 65371 [2021-07-13 20:45:48,851 INFO L226 Difference]: Without dead ends: 65367 [2021-07-13 20:45:48,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:45:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65367 states. [2021-07-13 20:45:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65367 to 45595. [2021-07-13 20:45:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45595 states, 45594 states have (on average 3.8691275167785233) internal successors, (176409), 45594 states have internal predecessors, (176409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45595 states to 45595 states and 176409 transitions. [2021-07-13 20:45:50,780 INFO L78 Accepts]: Start accepts. Automaton has 45595 states and 176409 transitions. Word has length 28 [2021-07-13 20:45:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:50,780 INFO L482 AbstractCegarLoop]: Abstraction has 45595 states and 176409 transitions. [2021-07-13 20:45:50,780 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) [2021-07-13 20:45:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 45595 states and 176409 transitions. [2021-07-13 20:45:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:50,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:50,927 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] [2021-07-13 20:45:51,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4179,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:51,128 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:51,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:51,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-07-13 20:45:51,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:51,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698819297] [2021-07-13 20:45:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:51,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:51,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698819297] [2021-07-13 20:45:51,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698819297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:51,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52756932] [2021-07-13 20:45:51,167 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 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 [2021-07-13 20:45:51,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:51,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52756932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:51,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:51,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:51,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279776240] [2021-07-13 20:45:51,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:51,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:51,315 INFO L87 Difference]: Start difference. First operand 45595 states and 176409 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) [2021-07-13 20:45:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:52,644 INFO L93 Difference]: Finished difference Result 59692 states and 226868 transitions. [2021-07-13 20:45:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:45:52,644 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 [2021-07-13 20:45:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:52,868 INFO L225 Difference]: With dead ends: 59692 [2021-07-13 20:45:52,868 INFO L226 Difference]: Without dead ends: 59692 [2021-07-13 20:45:52,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 548.4ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:45:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59692 states. [2021-07-13 20:45:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59692 to 45611. [2021-07-13 20:45:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45611 states, 45610 states have (on average 3.8710151282613463) internal successors, (176557), 45610 states have internal predecessors, (176557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45611 states to 45611 states and 176557 transitions. [2021-07-13 20:45:54,700 INFO L78 Accepts]: Start accepts. Automaton has 45611 states and 176557 transitions. Word has length 28 [2021-07-13 20:45:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:54,700 INFO L482 AbstractCegarLoop]: Abstraction has 45611 states and 176557 transitions. [2021-07-13 20:45:54,700 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) [2021-07-13 20:45:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 45611 states and 176557 transitions. [2021-07-13 20:45:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:54,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:54,812 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] [2021-07-13 20:45:55,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:55,013 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-07-13 20:45:55,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:55,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615415342] [2021-07-13 20:45:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:55,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615415342] [2021-07-13 20:45:55,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615415342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276657560] [2021-07-13 20:45:55,052 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 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 [2021-07-13 20:45:55,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:55,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:55,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:55,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:55,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276657560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:55,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:55,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:55,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677100167] [2021-07-13 20:45:55,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:55,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:55,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:55,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:55,163 INFO L87 Difference]: Start difference. First operand 45611 states and 176557 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) [2021-07-13 20:45:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:56,267 INFO L93 Difference]: Finished difference Result 59006 states and 224993 transitions. [2021-07-13 20:45:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:45:56,267 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 [2021-07-13 20:45:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:56,529 INFO L225 Difference]: With dead ends: 59006 [2021-07-13 20:45:56,529 INFO L226 Difference]: Without dead ends: 58994 [2021-07-13 20:45:56,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:45:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58994 states. [2021-07-13 20:45:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58994 to 45545. [2021-07-13 20:45:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45545 states, 45544 states have (on average 3.8721675742139468) internal successors, (176354), 45544 states have internal predecessors, (176354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45545 states to 45545 states and 176354 transitions. [2021-07-13 20:45:58,167 INFO L78 Accepts]: Start accepts. Automaton has 45545 states and 176354 transitions. Word has length 28 [2021-07-13 20:45:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:58,167 INFO L482 AbstractCegarLoop]: Abstraction has 45545 states and 176354 transitions. [2021-07-13 20:45:58,167 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) [2021-07-13 20:45:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 45545 states and 176354 transitions. [2021-07-13 20:45:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:45:58,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:58,523 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] [2021-07-13 20:45:58,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4181 [2021-07-13 20:45:58,723 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:58,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-07-13 20:45:58,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:58,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761986704] [2021-07-13 20:45:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:58,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761986704] [2021-07-13 20:45:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761986704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993375445] [2021-07-13 20:45:58,765 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 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 [2021-07-13 20:45:58,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:58,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:45:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:58,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993375445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:58,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:58,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:45:58,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900975824] [2021-07-13 20:45:58,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:45:58,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:58,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:45:58,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:45:58,887 INFO L87 Difference]: Start difference. First operand 45545 states and 176354 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) [2021-07-13 20:45:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:59,867 INFO L93 Difference]: Finished difference Result 50032 states and 191152 transitions. [2021-07-13 20:45:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:45:59,868 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 [2021-07-13 20:45:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:00,067 INFO L225 Difference]: With dead ends: 50032 [2021-07-13 20:46:00,067 INFO L226 Difference]: Without dead ends: 50032 [2021-07-13 20:46:00,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:46:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50032 states. [2021-07-13 20:46:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50032 to 45753. [2021-07-13 20:46:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45753 states, 45752 states have (on average 3.86968875677566) internal successors, (177046), 45752 states have internal predecessors, (177046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45753 states to 45753 states and 177046 transitions. [2021-07-13 20:46:01,613 INFO L78 Accepts]: Start accepts. Automaton has 45753 states and 177046 transitions. Word has length 28 [2021-07-13 20:46:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:01,613 INFO L482 AbstractCegarLoop]: Abstraction has 45753 states and 177046 transitions. [2021-07-13 20:46:01,613 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) [2021-07-13 20:46:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 45753 states and 177046 transitions. [2021-07-13 20:46:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:01,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:01,711 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] [2021-07-13 20:46:01,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4182,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:01,912 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:01,912 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-07-13 20:46:01,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:01,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305867550] [2021-07-13 20:46:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:01,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305867550] [2021-07-13 20:46:01,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305867550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931236985] [2021-07-13 20:46:01,947 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 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 [2021-07-13 20:46:01,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:01,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:01,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:01,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:02,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931236985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:02,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:02,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:46:02,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288460304] [2021-07-13 20:46:02,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:46:02,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:46:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:02,057 INFO L87 Difference]: Start difference. First operand 45753 states and 177046 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) [2021-07-13 20:46:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:02,973 INFO L93 Difference]: Finished difference Result 49879 states and 190754 transitions. [2021-07-13 20:46:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:46:02,973 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 [2021-07-13 20:46:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:03,191 INFO L225 Difference]: With dead ends: 49879 [2021-07-13 20:46:03,191 INFO L226 Difference]: Without dead ends: 49875 [2021-07-13 20:46:03,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:46:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49875 states. [2021-07-13 20:46:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49875 to 45693. [2021-07-13 20:46:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45693 states, 45692 states have (on average 3.8705681519740875) internal successors, (176854), 45692 states have internal predecessors, (176854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45693 states to 45693 states and 176854 transitions. [2021-07-13 20:46:04,972 INFO L78 Accepts]: Start accepts. Automaton has 45693 states and 176854 transitions. Word has length 28 [2021-07-13 20:46:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:04,972 INFO L482 AbstractCegarLoop]: Abstraction has 45693 states and 176854 transitions. [2021-07-13 20:46:04,972 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) [2021-07-13 20:46:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 45693 states and 176854 transitions. [2021-07-13 20:46:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:05,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:05,104 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] [2021-07-13 20:46:05,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4183 [2021-07-13 20:46:05,304 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:05,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:05,304 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 78 times [2021-07-13 20:46:05,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:05,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253955609] [2021-07-13 20:46:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:05,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:05,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253955609] [2021-07-13 20:46:05,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253955609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:05,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744171031] [2021-07-13 20:46:05,343 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 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 [2021-07-13 20:46:05,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:46:05,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:05,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:05,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744171031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:05,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:05,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:46:05,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351456544] [2021-07-13 20:46:05,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:05,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:05,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:05,422 INFO L87 Difference]: Start difference. First operand 45693 states and 176854 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) [2021-07-13 20:46:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:06,319 INFO L93 Difference]: Finished difference Result 49934 states and 190867 transitions. [2021-07-13 20:46:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:46:06,333 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 [2021-07-13 20:46:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:06,532 INFO L225 Difference]: With dead ends: 49934 [2021-07-13 20:46:06,532 INFO L226 Difference]: Without dead ends: 49934 [2021-07-13 20:46:06,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:46:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-07-13 20:46:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45797. [2021-07-13 20:46:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45797 states, 45796 states have (on average 3.8688531749497774) internal successors, (177178), 45796 states have internal predecessors, (177178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45797 states to 45797 states and 177178 transitions. [2021-07-13 20:46:07,933 INFO L78 Accepts]: Start accepts. Automaton has 45797 states and 177178 transitions. Word has length 28 [2021-07-13 20:46:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:07,933 INFO L482 AbstractCegarLoop]: Abstraction has 45797 states and 177178 transitions. [2021-07-13 20:46:07,933 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) [2021-07-13 20:46:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 45797 states and 177178 transitions. [2021-07-13 20:46:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:08,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:08,029 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] [2021-07-13 20:46:08,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4184,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:08,230 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:08,230 INFO L82 PathProgramCache]: Analyzing trace with hash -751583464, now seen corresponding path program 79 times [2021-07-13 20:46:08,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:08,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015730571] [2021-07-13 20:46:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:08,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:08,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015730571] [2021-07-13 20:46:08,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015730571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:08,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425041013] [2021-07-13 20:46:08,273 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 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 [2021-07-13 20:46:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:08,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425041013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:08,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:08,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:46:08,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565678071] [2021-07-13 20:46:08,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:46:08,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:46:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:46:08,388 INFO L87 Difference]: Start difference. First operand 45797 states and 177178 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-13 20:46:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:09,320 INFO L93 Difference]: Finished difference Result 56721 states and 216081 transitions. [2021-07-13 20:46:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:09,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 [2021-07-13 20:46:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:09,546 INFO L225 Difference]: With dead ends: 56721 [2021-07-13 20:46:09,547 INFO L226 Difference]: Without dead ends: 56631 [2021-07-13 20:46:09,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:46:09,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56631 states. [2021-07-13 20:46:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56631 to 45626. [2021-07-13 20:46:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45626 states, 45625 states have (on average 3.866717808219178) internal successors, (176419), 45625 states have internal predecessors, (176419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45626 states to 45626 states and 176419 transitions. [2021-07-13 20:46:11,343 INFO L78 Accepts]: Start accepts. Automaton has 45626 states and 176419 transitions. Word has length 28 [2021-07-13 20:46:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:11,343 INFO L482 AbstractCegarLoop]: Abstraction has 45626 states and 176419 transitions. [2021-07-13 20:46:11,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-13 20:46:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 45626 states and 176419 transitions. [2021-07-13 20:46:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:11,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:11,447 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] [2021-07-13 20:46:11,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-07-13 20:46:11,647 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 80 times [2021-07-13 20:46:11,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:11,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315850304] [2021-07-13 20:46:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:11,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:11,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315850304] [2021-07-13 20:46:11,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315850304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:11,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171565585] [2021-07-13 20:46:11,680 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 [2021-07-13 20:46:11,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:11,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:11,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:11,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:11,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171565585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:11,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:11,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:46:11,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170995700] [2021-07-13 20:46:11,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:11,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:11,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:11,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:11,750 INFO L87 Difference]: Start difference. First operand 45626 states and 176419 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) [2021-07-13 20:46:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:12,531 INFO L93 Difference]: Finished difference Result 50119 states and 191428 transitions. [2021-07-13 20:46:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:12,533 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 [2021-07-13 20:46:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:12,743 INFO L225 Difference]: With dead ends: 50119 [2021-07-13 20:46:12,743 INFO L226 Difference]: Without dead ends: 50107 [2021-07-13 20:46:12,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:46:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50107 states. [2021-07-13 20:46:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50107 to 45780. [2021-07-13 20:46:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45780 states, 45779 states have (on average 3.864523034579174) internal successors, (176914), 45779 states have internal predecessors, (176914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45780 states to 45780 states and 176914 transitions. [2021-07-13 20:46:14,259 INFO L78 Accepts]: Start accepts. Automaton has 45780 states and 176914 transitions. Word has length 28 [2021-07-13 20:46:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:14,259 INFO L482 AbstractCegarLoop]: Abstraction has 45780 states and 176914 transitions. [2021-07-13 20:46:14,259 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) [2021-07-13 20:46:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 45780 states and 176914 transitions. [2021-07-13 20:46:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:14,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:14,352 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] [2021-07-13 20:46:14,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4186,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:14,557 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 81 times [2021-07-13 20:46:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:14,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504378146] [2021-07-13 20:46:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:14,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504378146] [2021-07-13 20:46:14,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504378146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734944204] [2021-07-13 20:46:14,599 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 [2021-07-13 20:46:14,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:46:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:46:14,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:14,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734944204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:14,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:14,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:46:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801806259] [2021-07-13 20:46:14,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:14,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:14,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:14,672 INFO L87 Difference]: Start difference. First operand 45780 states and 176914 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) [2021-07-13 20:46:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:15,631 INFO L93 Difference]: Finished difference Result 50083 states and 191344 transitions. [2021-07-13 20:46:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:46:15,631 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 [2021-07-13 20:46:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:15,903 INFO L225 Difference]: With dead ends: 50083 [2021-07-13 20:46:15,904 INFO L226 Difference]: Without dead ends: 50063 [2021-07-13 20:46:15,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:46:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50063 states. [2021-07-13 20:46:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50063 to 45780. [2021-07-13 20:46:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45780 states, 45779 states have (on average 3.8644356582712596) internal successors, (176910), 45779 states have internal predecessors, (176910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45780 states to 45780 states and 176910 transitions. [2021-07-13 20:46:17,409 INFO L78 Accepts]: Start accepts. Automaton has 45780 states and 176910 transitions. Word has length 28 [2021-07-13 20:46:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:17,409 INFO L482 AbstractCegarLoop]: Abstraction has 45780 states and 176910 transitions. [2021-07-13 20:46:17,409 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) [2021-07-13 20:46:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 45780 states and 176910 transitions. [2021-07-13 20:46:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:17,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:17,508 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, 1, 1] [2021-07-13 20:46:17,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4187 [2021-07-13 20:46:17,709 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-07-13 20:46:17,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:17,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689029307] [2021-07-13 20:46:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:17,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:17,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689029307] [2021-07-13 20:46:17,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689029307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:17,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618533976] [2021-07-13 20:46:17,753 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 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 [2021-07-13 20:46:17,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:46:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:17,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618533976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:17,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:17,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:17,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920645103] [2021-07-13 20:46:17,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:17,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:17,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:17,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:17,839 INFO L87 Difference]: Start difference. First operand 45780 states and 176910 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) [2021-07-13 20:46:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:18,667 INFO L93 Difference]: Finished difference Result 50741 states and 194475 transitions. [2021-07-13 20:46:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:46:18,667 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 [2021-07-13 20:46:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:18,867 INFO L225 Difference]: With dead ends: 50741 [2021-07-13 20:46:18,867 INFO L226 Difference]: Without dead ends: 50728 [2021-07-13 20:46:18,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:18,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50728 states. [2021-07-13 20:46:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50728 to 48513. [2021-07-13 20:46:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48513 states, 48512 states have (on average 3.873330310026385) internal successors, (187903), 48512 states have internal predecessors, (187903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48513 states to 48513 states and 187903 transitions. [2021-07-13 20:46:20,349 INFO L78 Accepts]: Start accepts. Automaton has 48513 states and 187903 transitions. Word has length 28 [2021-07-13 20:46:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:20,349 INFO L482 AbstractCegarLoop]: Abstraction has 48513 states and 187903 transitions. [2021-07-13 20:46:20,349 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) [2021-07-13 20:46:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 48513 states and 187903 transitions. [2021-07-13 20:46:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:20,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:20,743 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] [2021-07-13 20:46:20,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-07-13 20:46:20,944 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-07-13 20:46:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:20,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624523885] [2021-07-13 20:46:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:20,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:20,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624523885] [2021-07-13 20:46:20,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624523885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:20,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122894776] [2021-07-13 20:46:20,984 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 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 [2021-07-13 20:46:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:21,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:21,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122894776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:21,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:21,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:21,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584520529] [2021-07-13 20:46:21,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:21,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:21,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:21,073 INFO L87 Difference]: Start difference. First operand 48513 states and 187903 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) [2021-07-13 20:46:21,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:21,648 INFO L93 Difference]: Finished difference Result 54090 states and 205931 transitions. [2021-07-13 20:46:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:21,649 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 [2021-07-13 20:46:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:22,115 INFO L225 Difference]: With dead ends: 54090 [2021-07-13 20:46:22,115 INFO L226 Difference]: Without dead ends: 54090 [2021-07-13 20:46:22,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:46:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54090 states. [2021-07-13 20:46:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54090 to 43050. [2021-07-13 20:46:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43050 states, 43049 states have (on average 3.8601593532950824) internal successors, (166176), 43049 states have internal predecessors, (166176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43050 states to 43050 states and 166176 transitions. [2021-07-13 20:46:23,476 INFO L78 Accepts]: Start accepts. Automaton has 43050 states and 166176 transitions. Word has length 28 [2021-07-13 20:46:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:23,476 INFO L482 AbstractCegarLoop]: Abstraction has 43050 states and 166176 transitions. [2021-07-13 20:46:23,476 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) [2021-07-13 20:46:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 43050 states and 166176 transitions. [2021-07-13 20:46:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:23,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:23,553 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] [2021-07-13 20:46:23,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-07-13 20:46:23,753 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:23,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-07-13 20:46:23,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:23,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927502265] [2021-07-13 20:46:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:23,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:23,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927502265] [2021-07-13 20:46:23,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927502265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:23,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692457645] [2021-07-13 20:46:23,789 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 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 [2021-07-13 20:46:23,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:23,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:23,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:23,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692457645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:23,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:23,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:46:23,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345361105] [2021-07-13 20:46:23,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:23,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:23,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:23,877 INFO L87 Difference]: Start difference. First operand 43050 states and 166176 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) [2021-07-13 20:46:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:24,685 INFO L93 Difference]: Finished difference Result 47933 states and 182630 transitions. [2021-07-13 20:46:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:46:24,686 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 [2021-07-13 20:46:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:24,843 INFO L225 Difference]: With dead ends: 47933 [2021-07-13 20:46:24,843 INFO L226 Difference]: Without dead ends: 47933 [2021-07-13 20:46:24,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:46:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47933 states. [2021-07-13 20:46:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47933 to 43883. [2021-07-13 20:46:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43883 states, 43882 states have (on average 3.858848730686842) internal successors, (169334), 43882 states have internal predecessors, (169334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43883 states to 43883 states and 169334 transitions. [2021-07-13 20:46:26,188 INFO L78 Accepts]: Start accepts. Automaton has 43883 states and 169334 transitions. Word has length 28 [2021-07-13 20:46:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:26,188 INFO L482 AbstractCegarLoop]: Abstraction has 43883 states and 169334 transitions. [2021-07-13 20:46:26,188 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) [2021-07-13 20:46:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 43883 states and 169334 transitions. [2021-07-13 20:46:26,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:26,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:26,271 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] [2021-07-13 20:46:26,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4190 [2021-07-13 20:46:26,471 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-07-13 20:46:26,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:26,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303104001] [2021-07-13 20:46:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:26,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:26,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303104001] [2021-07-13 20:46:26,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303104001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:26,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894434867] [2021-07-13 20:46:26,513 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 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 [2021-07-13 20:46:26,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:46:26,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:26,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894434867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:26,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:26,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:46:26,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672466178] [2021-07-13 20:46:26,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:26,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:26,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:26,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:26,601 INFO L87 Difference]: Start difference. First operand 43883 states and 169334 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) [2021-07-13 20:46:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:27,341 INFO L93 Difference]: Finished difference Result 45643 states and 175210 transitions. [2021-07-13 20:46:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:46:27,342 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 [2021-07-13 20:46:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:27,498 INFO L225 Difference]: With dead ends: 45643 [2021-07-13 20:46:27,498 INFO L226 Difference]: Without dead ends: 45643 [2021-07-13 20:46:27,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45643 states. [2021-07-13 20:46:28,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45643 to 43891. [2021-07-13 20:46:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43891 states, 43890 states have (on average 3.8586921850079743) internal successors, (169358), 43890 states have internal predecessors, (169358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43891 states to 43891 states and 169358 transitions. [2021-07-13 20:46:28,781 INFO L78 Accepts]: Start accepts. Automaton has 43891 states and 169358 transitions. Word has length 28 [2021-07-13 20:46:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:28,781 INFO L482 AbstractCegarLoop]: Abstraction has 43891 states and 169358 transitions. [2021-07-13 20:46:28,781 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) [2021-07-13 20:46:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43891 states and 169358 transitions. [2021-07-13 20:46:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:46:28,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:28,865 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] [2021-07-13 20:46:29,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4191,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:29,067 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:29,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:29,067 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-07-13 20:46:29,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:29,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721527754] [2021-07-13 20:46:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:29,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:29,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721527754] [2021-07-13 20:46:29,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721527754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177240548] [2021-07-13 20:46:29,106 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 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 [2021-07-13 20:46:29,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:29,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:46:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:29,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177240548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:29,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:46:29,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759335145] [2021-07-13 20:46:29,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:46:29,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:46:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:46:29,255 INFO L87 Difference]: Start difference. First operand 43891 states and 169358 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) [2021-07-13 20:46:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:29,984 INFO L93 Difference]: Finished difference Result 45363 states and 174288 transitions. [2021-07-13 20:46:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:46:29,985 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 [2021-07-13 20:46:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:30,147 INFO L225 Difference]: With dead ends: 45363 [2021-07-13 20:46:30,147 INFO L226 Difference]: Without dead ends: 45363 [2021-07-13 20:46:30,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45363 states. [2021-07-13 20:46:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45363 to 43785. [2021-07-13 20:46:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43785 states, 43784 states have (on average 3.858350082221816) internal successors, (168934), 43784 states have internal predecessors, (168934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 168934 transitions. [2021-07-13 20:46:31,433 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 168934 transitions. Word has length 28 [2021-07-13 20:46:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:31,433 INFO L482 AbstractCegarLoop]: Abstraction has 43785 states and 168934 transitions. [2021-07-13 20:46:31,433 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) [2021-07-13 20:46:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 168934 transitions. [2021-07-13 20:46:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:46:31,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:31,514 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] [2021-07-13 20:46:31,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4192,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:31,716 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:31,716 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-07-13 20:46:31,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:31,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170547004] [2021-07-13 20:46:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:32,127 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 93 [2021-07-13 20:46:32,275 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-07-13 20:46:32,441 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-07-13 20:46:32,588 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-07-13 20:46:32,752 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-07-13 20:46:32,904 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-07-13 20:46:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:32,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:32,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170547004] [2021-07-13 20:46:32,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170547004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:32,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874763097] [2021-07-13 20:46:32,984 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 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 [2021-07-13 20:46:33,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:33,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:33,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:46:33,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:33,298 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:46:33,512 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-13 20:46:33,745 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:46:34,272 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-07-13 20:46:34,499 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:46:34,711 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:46:35,013 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:46:35,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,215 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 21 treesize of output 13 [2021-07-13 20:46:35,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,231 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 [2021-07-13 20:46:35,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,246 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 [2021-07-13 20:46:35,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,262 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 [2021-07-13 20:46:35,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:46:35,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:46:35,295 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:46:35,309 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,319 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 [2021-07-13 20:46:35,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,698 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 113 [2021-07-13 20:46:35,698 INFO L628 ElimStorePlain]: treesize reduction 98, result has 81.7 percent of original size [2021-07-13 20:46:35,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,709 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 [2021-07-13 20:46:35,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:46:35,722 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,732 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:46:35,733 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:46:35,744 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:46:35,755 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,765 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 [2021-07-13 20:46:35,766 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:46:35,777 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:35,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:46:35,785 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:35,898 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:46:35,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:35,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-13 20:46:35,905 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 20 variables, input treesize:725, output treesize:97 [2021-07-13 20:46:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:36,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874763097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:36,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:36,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:46:36,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127754910] [2021-07-13 20:46:36,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:46:36,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:36,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:46:36,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:36,005 INFO L87 Difference]: Start difference. First operand 43785 states and 168934 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:36,762 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-07-13 20:46:37,440 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 92 [2021-07-13 20:46:37,674 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2021-07-13 20:46:37,852 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 68 [2021-07-13 20:46:38,053 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-07-13 20:46:38,239 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-07-13 20:46:38,788 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 107 [2021-07-13 20:46:39,135 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 94 [2021-07-13 20:46:40,180 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 133 [2021-07-13 20:46:40,793 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2021-07-13 20:46:40,957 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-13 20:46:41,152 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-13 20:46:42,129 WARN L205 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 117 [2021-07-13 20:46:42,921 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 136 [2021-07-13 20:46:43,546 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 112 [2021-07-13 20:46:44,231 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 138 [2021-07-13 20:46:44,987 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 136 [2021-07-13 20:46:45,167 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-07-13 20:46:45,931 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 144 [2021-07-13 20:46:46,227 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-07-13 20:46:47,025 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 142 [2021-07-13 20:46:47,359 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-07-13 20:46:47,549 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-07-13 20:46:47,707 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-13 20:46:47,934 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-07-13 20:46:48,235 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-07-13 20:46:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:48,542 INFO L93 Difference]: Finished difference Result 51109 states and 190238 transitions. [2021-07-13 20:46:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:46:48,543 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:46:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:48,766 INFO L225 Difference]: With dead ends: 51109 [2021-07-13 20:46:48,766 INFO L226 Difference]: Without dead ends: 51049 [2021-07-13 20:46:48,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 13318.4ms TimeCoverageRelationStatistics Valid=557, Invalid=3103, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:46:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51049 states. [2021-07-13 20:46:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51049 to 43920. [2021-07-13 20:46:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43920 states, 43919 states have (on average 3.8575331860925797) internal successors, (169419), 43919 states have internal predecessors, (169419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43920 states to 43920 states and 169419 transitions. [2021-07-13 20:46:50,051 INFO L78 Accepts]: Start accepts. Automaton has 43920 states and 169419 transitions. Word has length 30 [2021-07-13 20:46:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:50,051 INFO L482 AbstractCegarLoop]: Abstraction has 43920 states and 169419 transitions. [2021-07-13 20:46:50,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 43920 states and 169419 transitions. [2021-07-13 20:46:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:46:50,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:50,147 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] [2021-07-13 20:46:50,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4193 [2021-07-13 20:46:50,347 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-07-13 20:46:50,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:50,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884600682] [2021-07-13 20:46:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:50,581 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-07-13 20:46:50,747 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-07-13 20:46:51,227 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-13 20:46:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:51,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:51,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884600682] [2021-07-13 20:46:51,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884600682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:51,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454409121] [2021-07-13 20:46:51,537 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:51,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:46:51,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:46:51,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:52,117 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-13 20:46:52,542 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:46:53,256 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 134 [2021-07-13 20:46:53,542 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-13 20:46:54,525 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 181 [2021-07-13 20:46:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:54,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:54,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:54,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:54,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:54,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:54,813 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 36 treesize of output 19 [2021-07-13 20:46:54,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:54,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:54,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:54,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:54,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:54,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:54,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:54,833 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 31 treesize of output 19 [2021-07-13 20:46:54,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:55,628 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 217 [2021-07-13 20:46:55,629 INFO L628 ElimStorePlain]: treesize reduction 665, result has 42.2 percent of original size [2021-07-13 20:46:55,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:55,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:55,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:55,642 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 [2021-07-13 20:46:55,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:55,851 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-07-13 20:46:55,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:55,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:55,866 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:46:55,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:56,073 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2021-07-13 20:46:56,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:56,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:56,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:56,088 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 22 [2021-07-13 20:46:56,089 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:56,277 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-07-13 20:46:56,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:56,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:56,292 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 [2021-07-13 20:46:56,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:56,478 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-07-13 20:46:56,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:56,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:56,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,491 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 31 treesize of output 19 [2021-07-13 20:46:56,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:56,669 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-07-13 20:46:56,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:46:56,680 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:56,839 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-13 20:46:56,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:56,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:56,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:56,851 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 19 [2021-07-13 20:46:56,853 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:57,003 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-13 20:46:57,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:57,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:57,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:57,016 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 35 treesize of output 19 [2021-07-13 20:46:57,017 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:57,159 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-13 20:46:57,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:57,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:46:57,170 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:57,303 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:46:57,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:57,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:57,315 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 [2021-07-13 20:46:57,316 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:57,441 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:46:57,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:57,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 33 dim-0 vars, 11 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-13 20:46:57,448 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 44 variables, input treesize:1231, output treesize:100 [2021-07-13 20:46:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:57,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454409121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:57,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:57,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:46:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706346006] [2021-07-13 20:46:57,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:46:57,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:46:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:46:57,554 INFO L87 Difference]: Start difference. First operand 43920 states and 169419 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) [2021-07-13 20:46:57,726 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 35 [2021-07-13 20:46:58,037 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 52 [2021-07-13 20:46:58,389 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 110 [2021-07-13 20:46:58,549 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-07-13 20:46:59,592 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 128 [2021-07-13 20:47:00,127 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 86 [2021-07-13 20:47:00,398 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 73 [2021-07-13 20:47:00,737 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-07-13 20:47:02,058 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 174 DAG size of output: 161 [2021-07-13 20:47:03,125 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 148 [2021-07-13 20:47:03,364 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-07-13 20:47:03,580 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-07-13 20:47:05,483 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 215 DAG size of output: 181 [2021-07-13 20:47:05,980 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 146 [2021-07-13 20:47:06,531 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 147 [2021-07-13 20:47:06,914 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 72 [2021-07-13 20:47:07,319 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-07-13 20:47:09,263 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-07-13 20:47:09,487 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2021-07-13 20:47:09,665 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2021-07-13 20:47:10,036 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2021-07-13 20:47:10,310 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 56 [2021-07-13 20:47:10,637 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-07-13 20:47:10,932 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 50 [2021-07-13 20:47:11,491 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2021-07-13 20:47:11,938 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-07-13 20:47:12,184 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2021-07-13 20:47:12,493 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2021-07-13 20:47:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:12,646 INFO L93 Difference]: Finished difference Result 51275 states and 190720 transitions. [2021-07-13 20:47:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:47:12,647 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 [2021-07-13 20:47:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:12,819 INFO L225 Difference]: With dead ends: 51275 [2021-07-13 20:47:12,819 INFO L226 Difference]: Without dead ends: 51176 [2021-07-13 20:47:12,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 16836.9ms TimeCoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:47:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51176 states. [2021-07-13 20:47:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51176 to 43931. [2021-07-13 20:47:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43931 states, 43930 states have (on average 3.857546096061917) internal successors, (169462), 43930 states have internal predecessors, (169462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43931 states to 43931 states and 169462 transitions. [2021-07-13 20:47:14,014 INFO L78 Accepts]: Start accepts. Automaton has 43931 states and 169462 transitions. Word has length 30 [2021-07-13 20:47:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:14,014 INFO L482 AbstractCegarLoop]: Abstraction has 43931 states and 169462 transitions. [2021-07-13 20:47:14,014 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) [2021-07-13 20:47:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 43931 states and 169462 transitions. [2021-07-13 20:47:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:47:14,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:14,101 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] [2021-07-13 20:47:14,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4216,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:14,302 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:14,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-07-13 20:47:14,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:14,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915027484] [2021-07-13 20:47:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:14,884 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 54 [2021-07-13 20:47:15,262 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 112 [2021-07-13 20:47:15,550 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-07-13 20:47:15,751 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 117 [2021-07-13 20:47:16,047 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-07-13 20:47:16,412 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 158 [2021-07-13 20:47:17,006 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 76 [2021-07-13 20:47:17,208 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-07-13 20:47:17,403 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-07-13 20:47:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:17,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915027484] [2021-07-13 20:47:17,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915027484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996703121] [2021-07-13 20:47:17,553 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 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 [2021-07-13 20:47:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:47:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,831 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 [2021-07-13 20:47:18,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,845 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 [2021-07-13 20:47:18,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,858 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 [2021-07-13 20:47:18,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,872 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 [2021-07-13 20:47:18,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,886 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 [2021-07-13 20:47:18,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,900 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 [2021-07-13 20:47:18,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,914 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 [2021-07-13 20:47:18,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,928 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 [2021-07-13 20:47:18,930 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,943 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 [2021-07-13 20:47:18,944 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,956 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 [2021-07-13 20:47:18,957 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,970 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 [2021-07-13 20:47:18,971 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,983 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 [2021-07-13 20:47:18,984 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:18,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:18,997 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 [2021-07-13 20:47:18,998 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,012 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 [2021-07-13 20:47:19,013 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,027 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 [2021-07-13 20:47:19,027 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,040 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 [2021-07-13 20:47:19,041 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,054 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 47 treesize of output 25 [2021-07-13 20:47:19,055 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,069 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 [2021-07-13 20:47:19,070 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,084 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 [2021-07-13 20:47:19,085 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,099 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 [2021-07-13 20:47:19,100 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,113 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 [2021-07-13 20:47:19,114 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,128 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 [2021-07-13 20:47:19,128 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,146 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 [2021-07-13 20:47:19,147 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,162 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 42 treesize of output 22 [2021-07-13 20:47:19,163 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,178 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 [2021-07-13 20:47:19,179 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,194 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 [2021-07-13 20:47:19,195 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,210 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 43 treesize of output 22 [2021-07-13 20:47:19,211 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,226 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 [2021-07-13 20:47:19,227 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,243 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 [2021-07-13 20:47:19,243 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,258 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 [2021-07-13 20:47:19,258 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,273 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 [2021-07-13 20:47:19,273 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,288 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 [2021-07-13 20:47:19,289 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,304 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 [2021-07-13 20:47:19,305 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,320 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 [2021-07-13 20:47:19,321 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,336 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 [2021-07-13 20:47:19,337 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,352 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 [2021-07-13 20:47:19,352 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,368 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 [2021-07-13 20:47:19,369 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,383 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 [2021-07-13 20:47:19,384 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,398 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 [2021-07-13 20:47:19,399 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,414 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 53 treesize of output 22 [2021-07-13 20:47:19,415 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,429 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 42 treesize of output 22 [2021-07-13 20:47:19,430 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,464 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 [2021-07-13 20:47:19,465 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,485 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 [2021-07-13 20:47:19,486 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,506 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 [2021-07-13 20:47:19,508 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,528 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 [2021-07-13 20:47:19,529 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,548 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 [2021-07-13 20:47:19,549 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,569 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 [2021-07-13 20:47:19,569 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,589 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 [2021-07-13 20:47:19,590 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,608 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 [2021-07-13 20:47:19,609 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,629 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 [2021-07-13 20:47:19,629 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,651 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 [2021-07-13 20:47:19,652 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,673 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 [2021-07-13 20:47:19,674 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,698 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 [2021-07-13 20:47:19,698 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,715 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 [2021-07-13 20:47:19,716 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,734 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 49 treesize of output 25 [2021-07-13 20:47:19,735 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,753 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 [2021-07-13 20:47:19,754 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,772 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 [2021-07-13 20:47:19,773 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,791 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 [2021-07-13 20:47:19,792 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,817 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 [2021-07-13 20:47:19,819 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,830 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 [2021-07-13 20:47:19,831 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,842 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 [2021-07-13 20:47:19,843 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,854 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 [2021-07-13 20:47:19,854 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:19,860 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 [2021-07-13 20:47:19,861 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,960 INFO L628 ElimStorePlain]: treesize reduction 190, result has 28.3 percent of original size [2021-07-13 20:47:19,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:47:19,961 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-07-13 20:47:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:20,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996703121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:20,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:20,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:47:20,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018893712] [2021-07-13 20:47:20,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:47:20,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:20,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:47:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:47:20,026 INFO L87 Difference]: Start difference. First operand 43931 states and 169462 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) [2021-07-13 20:47:20,641 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 70 [2021-07-13 20:47:21,045 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 71 [2021-07-13 20:47:21,473 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 68 [2021-07-13 20:47:21,918 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2021-07-13 20:47:22,318 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 94 [2021-07-13 20:47:22,582 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 82 [2021-07-13 20:47:22,756 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:47:22,975 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 74 [2021-07-13 20:47:23,152 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2021-07-13 20:47:23,483 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 69 [2021-07-13 20:47:23,932 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 92 [2021-07-13 20:47:24,106 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 67 [2021-07-13 20:47:24,481 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 80 [2021-07-13 20:47:24,743 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 85 [2021-07-13 20:47:24,928 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-07-13 20:47:25,260 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 72 [2021-07-13 20:47:25,474 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 75 [2021-07-13 20:47:25,720 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 77 [2021-07-13 20:47:26,283 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2021-07-13 20:47:26,698 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-07-13 20:47:26,957 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 67 [2021-07-13 20:47:27,143 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-13 20:47:27,337 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:47:27,652 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 73 [2021-07-13 20:47:27,869 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2021-07-13 20:47:28,102 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 78 [2021-07-13 20:47:28,644 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2021-07-13 20:47:28,928 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-07-13 20:47:29,178 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2021-07-13 20:47:29,534 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-07-13 20:47:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:29,898 INFO L93 Difference]: Finished difference Result 55765 states and 208985 transitions. [2021-07-13 20:47:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:47:29,898 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 [2021-07-13 20:47:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:30,096 INFO L225 Difference]: With dead ends: 55765 [2021-07-13 20:47:30,096 INFO L226 Difference]: Without dead ends: 55735 [2021-07-13 20:47:30,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 10675.6ms TimeCoverageRelationStatistics Valid=534, Invalid=3126, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:47:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55735 states. [2021-07-13 20:47:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55735 to 43970. [2021-07-13 20:47:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43970 states, 43969 states have (on average 3.8572630717096135) internal successors, (169600), 43969 states have internal predecessors, (169600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43970 states to 43970 states and 169600 transitions. [2021-07-13 20:47:31,481 INFO L78 Accepts]: Start accepts. Automaton has 43970 states and 169600 transitions. Word has length 30 [2021-07-13 20:47:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:31,481 INFO L482 AbstractCegarLoop]: Abstraction has 43970 states and 169600 transitions. [2021-07-13 20:47:31,481 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) [2021-07-13 20:47:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 43970 states and 169600 transitions. [2021-07-13 20:47:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:47:31,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:31,576 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] Received shutdown request... [2021-07-13 20:47:31,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4269 [2021-07-13 20:47:31,777 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-07-13 20:47:31,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:31,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439529719] [2021-07-13 20:47:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-07-13 20:47:31,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408215402] [2021-07-13 20:47:31,781 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 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 [2021-07-13 20:47:31,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:31,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:31,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:47:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:31,817 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-07-13 20:47:32,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4500,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:32,018 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:47:32,020 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:47:32,022 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:47:32,022 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:47:32 BasicIcfg [2021-07-13 20:47:32,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:47:32,022 INFO L168 Benchmark]: Toolchain (without parser) took 748134.16 ms. Allocated memory was 196.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 175.9 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. [2021-07-13 20:47:32,022 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 196.1 MB. Free memory is still 177.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:47:32,022 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.09 ms. Allocated memory is still 196.1 MB. Free memory was 175.9 MB in the beginning and 174.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:47:32,022 INFO L168 Benchmark]: Boogie Preprocessor took 14.14 ms. Allocated memory is still 196.1 MB. Free memory was 174.4 MB in the beginning and 173.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:47:32,023 INFO L168 Benchmark]: RCFGBuilder took 312.67 ms. Allocated memory is still 196.1 MB. Free memory was 173.3 MB in the beginning and 160.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:47:32,023 INFO L168 Benchmark]: TraceAbstraction took 747780.62 ms. Allocated memory was 196.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 159.8 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. [2021-07-13 20:47:32,023 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 0.15 ms. Allocated memory is still 196.1 MB. Free memory is still 177.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.09 ms. Allocated memory is still 196.1 MB. Free memory was 175.9 MB in the beginning and 174.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.14 ms. Allocated memory is still 196.1 MB. Free memory was 174.4 MB in the beginning and 173.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 312.67 ms. Allocated memory is still 196.1 MB. Free memory was 173.3 MB in the beginning and 160.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 747780.62 ms. Allocated memory was 196.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 159.8 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 2.7 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 analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - 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: 747658.9ms, OverallIterations: 260, TraceHistogramMax: 3, EmptinessCheckTime: 7760.6ms, AutomataDifference: 395849.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11494 SDtfs, 72512 SDslu, 87170 SDs, 0 SdLazy, 138926 SolverSat, 13156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 77278.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16646 GetRequests, 5457 SyntacticMatches, 259 SemanticMatches, 10930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185356 ImplicationChecksByTransitivity, 338918.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48513occurred in iteration=252, InterpolantAutomatonStates: 9741, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 105049.4ms AutomataMinimizationTime, 259 MinimizatonAttempts, 1280569 StatesRemovedByMinimization, 259 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 835.0ms SsaConstructionTime, 2740.2ms SatisfiabilityAnalysisTime, 177760.6ms InterpolantComputationTime, 13754 NumberOfCodeBlocks, 13754 NumberOfCodeBlocksAsserted, 896 NumberOfCheckSat, 13239 ConstructedInterpolants, 147 QuantifiedInterpolants, 252291 SizeOfPredicates, 1140 NumberOfNonLiveVariables, 17888 ConjunctsInSsa, 3836 ConjunctsInUnsatCore, 515 InterpolantComputations, 3 PerfectInterpolantSequences, 1023/4362 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